MIC2505/2506 - Micrel Semiconductor, Inc.

April 1998 1 MIC2505/2506

MIC2505/2506 Micrel

MIC2505/2506

Single 2A / Dual 1A / High-Side Switches

Final Information

General Description

The MIC2505, MIC2505-1, MIC2505-2, and MIC2506 are

single and dual integrated high-side power switches that

consist of TTL compatible control/enable inputs, a charge

pump, and protected N-channel MOSFETs. The MIC2505/6

family can be used instead of separate high-side drivers and

MOSFETs in many low-voltage applications.

The MIC2505/6 family controls voltages ranging from 2.7V to

7.5V. The MIC2505-series can deliver at least 2A continuous

current while the MIC2506 can deliver at least 1A continuous

current from each output. A slow turn-on feature prevents

high inrush current when switching capacitive loads. The

internal control circuitry is powered from the same 2.7V to

7.5V. Within the device’s input range, outputs can be forced

higher than the input voltage when disabled.

Multipurpose open-drain fault flag outputs indicate overcur-

rent limiting, open-load detection (except MIC2505-1 and -2

versions), thermal shutdown, or undervoltage lockout for

each channel.

Overcurrent limiting is internally fixed and requires no exter-

nal components.

Open-load detection is active when the switch is off. When

off, a normal load pulls the output pin low. If the load is open,

an optional, external, high-value resistor pulls the output pin

high, triggering the fault flag. MIC2505-1 and -2 versions are

tailored to Universal Serial Bus (USB) applications and do not

include open-load detection.

Thermal shutdown turns off the output if the die temperature

exceeds approximately 135°C. If enabled, the switch auto-

matically restarts when the temperature falls 10°C.

Undervoltage lockout (UVLO) shuts off the output if the

supply drops below 2.3V typical and reenables the output

when the supply exceeds 2.5V typical.

Typical Applications

Load A

OFF

MIC2505BM

Load

CTL OUT

FLG

GND OUT

GATE IN

Optional

Output Delay

Capacitor

100k

INFAULT

2.7V to 7.5V

Pull-up

Resistor

(100k) 18

Optional

Open Load

Detect Resistor

(MIC2505BN or

MIC2505BM

only)

0.1µF

A ON

A OFF

MIC2506BM

CTL A OUT A

FLG A

FLG B GND

CTL B OUT B

INFAULT A

2.7V to 7.5V

Pull-up

Resistors

(100k each) 18

Optional

Open Load

Detect Resistors

0.1µF

Load B

100k 100k

B ON

B OFF

FAULT B

Single and Dual Switch/Circuit Breakers with Open-Load Detection and Fault Output

Features

•Low MOSFET on resistance to 2.7V

30mΩ typical at 5V (MIC2505-series)

35mΩ typical at 3.3V (MIC2505-series)

75mΩ typical at 5V (each MIC2506 output)

80mΩ typical at 3.3V (each MIC2506 output)

•2.7V to 7.5V input

•110µA typical on-state supply current

•1µA typical off-state supply current

•Output can be forced higher than input (off-state)

•Current limit

•Thermal shutdown

•2.5V undervoltage lockout (UVLO)

•Open-load detection

(MIC2505BN/M and MIC2506BN/M only)

•Open-drain fault flag

•5ms (slow) turn-on and fast turnoff

•Logic-level control/enable input

Applications

•USB Power Distribution

•3.3V and 5V power management

•PC Card card inrush limiting switch

•Hot plug-in power supplies

•Battery-charger circuits

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

MIC2505/2506 Micrel

MIC2505/2506 2 April 1998

Pin Configuration

OUT

CTL

FLG

GND

GATE

MIC2505/-1/-2

OUT A

GND

OUT B

CTL A

FLG A

FLG B

CTL B

MIC2506

8-Pin SOIC (M)

8-Pin DIP (N) 8-Pin SOIC (M)

8-Pin DIP (N)

LOGIC,

CHARGE

PUMP

6, 8 (OUT)

3 (GND)

(CTL A) 1

(FLG A) 2 5, 7 (IN)

(GATE A) 4

MIC2505/-1/-2

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

8 (OUT A)

5 (OUT B)

7 (IN)

6 (GND)

(CTL A) 1

(FLG A) 2

(FLG B) 3

(CTL B) 4

MIC2506

Part Number Control/Enable Open-Load Detect Temperature Range Package

Single-Switch

MIC2505BM Active-High Yes –40°C to +85°C 8-pin SOIC

MIC2505BN Active-High Yes –40°C to +85°C 8-pin DIP

MIC2505-1BM Active-High No –40°C to +85°C 8-pin SOIC

MIC2505-1BN Active-High No –40°C to +85°C 8-pin DIP

MIC2505-2BM Active-Low No –40°C to +85°C 8-pin SOIC

MIC2505-2BN Active-Low No –40°C to +85°C 8-pin DIP

Dual Switch

MIC2506BM Active-High Yes –40°C to +85°C 8-pin SOIC

MIC2506BN Active-High Yes –40°C to +85°C 8-pin DIP

Ordering Information

April 1998 3 MIC2505/2506

MIC2505/2506 Micrel

Pin Description

Pin Number Pin Number Pin Name Pin Function

MIC2505 series

MIC2506

1 1 / 4 CTL (A/B) Control (Input): TTL compatible control input. High input typically > 1.8V.

Low input typically < 1.6V. MIC2505, MIC2505-1 and MIC2506 are active

high. MIC2505-2 is active low.

2 2 / 3 FLG (A/B) Fault Flag (Output): Active-low, open-drain output. If CTL is low, indicates

open load. If CTL is high, indicates current limit, thermal shutdown, or

UVLO.

MIC2505-1 and -2 do not support open-load detect

3 6 GND Ground: Return.

4—GATE Output MOSFET Gate: Open for fastest rise time. Connect capacitor to

ground to slow rise time. (See MIC2505 Turn-On Delay graph)

5, 7 7 IN Supply Input: Output MOSFET drain. Also supplies IC’s internal circuitry.

Connect to supply.

MIC2505 series only:

Pins 5 and 7 must be externally connected together.

6, 8 8 / 5 OUT (A/B) Switch Output: Output MOSFET source. Typically connect to switched side

of load. Output voltage can be pulled above input voltage in off mode.

MIC2505 series only:

Pins 6 and 8 must be externally connected together.

Absolute Maxim um Ratings

Supply Voltage (VIN) ....................................................8.0V

Fault Flag Voltage (VFLG).............................................7.5V

Fault Flag Current (IFLG) ............................................50mA

Output Voltage (VOUT) .................................................7.5V

Output Current (IOUT)...............................Internally Limited

Gate Voltage (VGATE) ......................................... VIN + 15V

Control Input (VCTL) ....................................... –0.3V to 15V

Storage Temperature (TA) ....................... –65°C to +150°C

Lead Temperature (Soldering 5 sec.) ....................... 260°C

Operating Ratings

Supply Voltage (VIN) ................................... +2.7V to +7.5V

Ambient Operating Temperature (TA) ........ –40°C to +85°C

Thermal Resistance

SOIC (θJA).........................................................160°C/W

DIP (θJA)............................................................105°C/W

MIC2505/2506 Micrel

MIC2505/2506 4 April 1998

Electrical Characteristics

VIN = +5V; GATE = open; TA = 25°C, bold indicates –40°C ≤ TA ≤ +85°C; unless noted

Parameter Condition Min Typ Max Units

Supply Current MIC2505-1 VCTL = logic 0, OUT = open 0.75 5µA

MIC2506 VCTL = logic 1, OUT = open 110 160 µA

MIC2505-2 VCTL = logic 0, OUT = open 110 160 µA

VCTL = logic 1, OUT = open 0.75 5µA

Control Input Voltage VCTL = logic 0 → logic 1 transition 2.1 2.4 V

VCTL = logic 1 → logic 0 transition 0.8 1.9 V

Control Input Current VCTL = logic 0 0.01 1µA

VCTL = logic 1 0.01 1µA

Control Input Capacitance 1pF

Output MOSFET Resistance MIC2505 series VIN = 5V, TA = 25°C3050 mΩ

VIN = 5V, –40°C < TA < +85°C60 mΩ

VIN = 3.3V, TA = 25°C3560 mΩ

VIN = 3.3V, –40°C < TA < +85°C75 mΩ

MIC2506 VIN = 5V, TA = 25°C75125 mΩ

VIN = 5V, –40°C < TA < +85°C150 mΩ

VIN = 3.3V, TA = 25°C80135 mΩ

VIN = 3.3V, –40°C < TA < +85°C165 mΩ

Output Turn-On Delay MIC2505 series RL = 10Ω, CGATE = 0 200 850 2000 µs

MIC2506 RL = 10Ω each output 100 700 2000 µs

Output Turn-On Rise Time MIC2505 series RL = 10Ω, CGATE = 0 500 3000 7500 µs

MIC2506 RL = 10Ω each output 200 2000 6000 µs

Output Turnoff Delay MIC2505 series RL = 10Ω, CGATE = 0 0.7 20 µs

MIC2506 RL = 10Ω each output 0.8 20 µs

Output Turnoff Fall Time MIC2505 series RL = 10Ω, CGATE = 0 1.5 20 µs

MIC2506 RL = 10Ω each output 0.7 20 µs

Output Leakage Current 10 µA

Current Limit Threshold MIC2505 series 24A

MIC2506 123A

Open Load Threshold, Note 1 VCTL = logic low, Note 2 0.5 11.5 V

Overtemperature Shutdown TJ increasing 135 °C

Threshold TJ decreasing 125 °C

Error Flag Output Resistance VIN = 5V, IL = 10mA 10 25 Ω

VIN = 3.3V, IL = 10mA 15 40 Ω

Error Flag Off Current VFLAG = 5V 0.01 1µA

UVLO Threshold VIN = increasing 2.2 2.5 2.7 V

VIN = decreasing 2.0 2.3 2.5 V

General Note: Devices are ESD protected, however, handling precautions recommended.

General Note: All limits guaranteed by testing or statistical analysis.

Note 1: MIC2505-1 and -2 versions have no open load detect feature.

Note 2: Open-load threshold is the output voltage (VOUT) where FLG becomes active (low) when CTL is low. OUT is pulled high by a 100k external

resistor to VIN.

April 1998 5 MIC2505/2506

MIC2505/2506 Micrel

Typical Characteristics Note 2

-2 024

TIME (µs)

-5

CONTROL (V)

-2

-2 0246

OUTPUT (V)

TIME (ms)

MIC2505 Turn-On, Turnoff

Characteristics

RL = 5Ω

(IL = 1A)

100

2345678

OUTPUT RESISTANCE (mΩ)

SUPPLY VOLTAGE (V)

Output On Resistance

vs. Supply Voltage

MIC2505

MIC2506

100

-40 -20 0 20 40 60 80 100

ON RESISTANCE (mΩ)

TEMPERATURE (°C)

Output On Resistance

vs. Temperature

MIC2506

MIC2505

-1 012

TIME (µs)

-5

CONTROL (V)

-2

-2 0246

OUTPUT (V)

TIME (ms)

MIC2506 Turn-On, Turnoff

Characteristics

= 5Ω

= 1A)

1.5

2.0

2.5

3.0

-40 -20 0 20 40 60 80 100

THRESHOLD VOLTAGE (V)

TEMPERATURE (°C)

UVLO Threshold Voltage

vs. Temperature

VIN RISING

VIN FALLING

100

200

300

400

0.1 1 10 100

ERROR FLAG VOLTAGE (mV)

ERROR FLAG CURRENT (mA)

Error Flag Voltage

vs. Error Flag Current

FLG = ACTIVE

VDD = 3.3V

VDD = 5V

100

120

140

160

180

200

2345678

SUPPLY CURRENT (µA)

SUPPLY VOLTAGE (V)

On-State Supply Current

vs. Supply Voltage

0.5

1.0

1.5

2.0

2345678

SUPPLY CURRENT (µA)

SUPPLY VOLTAGE (V)

Off-State Supply Current

vs. Supply Voltage

1.0

1.5

2.0

2.5

2345

THRESHOLD VOLTAGE (V)

SUPPLY VOLTAGE (V)

Control Threshold

vs. Supply Voltage

VCTL RISING

VCTL FALLING

Test Circuits

MIC2506BM

CTL A OUT A

FLG A

GND

CTL B OUT B

FLG B

B ON

B OFF

A ON

A OFF

+5V

1µF

10Ω

MIC2505/-1/-2

CTL OUT

FLG

GND OUT

GATE IN

+5V

1µF 10Ω

VFLG

10kΩ10kΩ

VFLG A

VFLG B

10kΩ

MIC2505/2506 Micrel

MIC2505/2506 6 April 1998

100

120

140

160

180

200

-40 -20 0 20 40 60 80 100

SUPPLY CURRENT (µA)

TEMPERATURE (°C)

On-State Supply Current

vs. Temperature

0.5

1.0

1.5

2.0

-40 -20 0 20 40 60 80 100

SUPPLY CURRENT (µA)

TEMPERATURE (°C)

Off-State Supply Current

vs. Temperature

1.5

2.0

2.5

-40 -20 0 20 40 60 80 100

THRESHOLD VOLTAGE (V)

TEMPERATURE (°C)

Control Threshold

vs. Temperature

CTL

RISING

CTL

FALLING

200

400

600

800

1000

0 50 100 150 200 250

TURN-ON DELAY (ms)

CAPACITANCE (nF)

MIC2505 Turn-On Delay

with External Gate Capacitance

April 1998 7 MIC2505/2506

MIC2505/2506 Micrel

Block Diagrams

1.2V

REFERENCE

THERMAL

SHUTDOWN

OSC.

CHARGE

PUMP

OUT

UVLO

GATE

CONTROL

OPEN LOAD

DETECT FLG

CTL

CURRENT

LIMIT

GATEGND

Not Included in

MIC2505-1, -2

MIC2505/2505-1/2505-2

MIC2505-Series Block Diagram

1.2V

REFERENCE

THERMAL

SHUTDOWN

CHARGE

PUMP

OUT B

UVLO

GATE

CONTROL

OPEN LOAD

DETECT

CTL A

GATE

CONTROL

OUT A

OPEN LOAD

DETECT

FLG B

CHARGE

PUMP

CTL B

OSC.

FLG A

CURRENT

LIMIT

CURRENT

LIMIT

GND

MIC2506

MIC2506 Block Diagram

MIC2505/2506 Micrel

MIC2505/2506 8 April 1998

Functional Description

The MIC2505-series and MIC2506 are high-side N-Channel

switches. The MIC2505, MIC2505-1, and MIC2506 have

active-high enable inputs. The MIC2505-2 has an active-low

input. Fault conditions inhibit output transistor turn-on or

turnoff when enabled.

Control Input

CTL (control input) activates the oscillator, thermal shut-

down, UVLO, 1.2V reference, and gate control circuits. If

there are no fault conditions, the output MOSFET turns on

when enabled.

Reference

A 1.2V bandgap reference supplies a regulated voltage to the

thermal shutdown and undervoltage lockout circuits. The

reference is only active when CTL is enabled.

Oscillator/Charge Pump

The oscillator produces an 80kHz square wave output which

drives the charge pump. The oscillator is enabled when CTL

is active.

The charge pump is a voltage quintupler (5×). The charge

pump capacitors are self contained.

Gate Control

The gate control circuit charges the output MOSFET gate

from the charge pump output or discharges the MOSFET

gate to ground as determined by CTL, thermal shutdown, or

UVLO (undervoltage lockout).

An optional, external capacitor may be connected to the

MIC2505 GATE to lengthen the rise time. This slows the turn

on of the MOSFET output switch. (See “MIC2505 Turn-On

Delay” graph.) Since this pin connects directly to the MOSFET

gate, use ESD precautions when contacting components

connected to this pin. Leakage resistance may increase turn-

on times.

Input and Output

IN (input) is the supply connection to the logic circuitry and the

drain of the output MOSFET. OUT (output) is the source of the

output MOSFET. In a typical circuit, current flows through the

switch from IN to OUT toward the load.

The output MOSFET and driver circuitry are also designed to

allow the MOSFET source to be externally forced to a higher

voltage than the drain (VOUT > VIN) when the output switch is

off and VIN > UVLO minimum. In this situation, the MIC2505/6

avoids undesirable drain to body diode reverse current flow

by grounding the body when the switch is off. (The conven-

tional method for optimum turn-on threshold has the source

connected to the body. This would allow a large current to flow

when Vsource > Vdrain + 0.6V.)

MIC2505 Series Only

Duplicate IN and OUT leads are not internally connected.

Connect both IN pins to the supply. Connect both OUT leads

to the load.

Thermal Shutdown

Thermal shutdown shuts off the output MOSFET and signals

the fault flag if the die temperature exceeds 135°C. 10°C of

hysteresis prevents the switch from turning on until the die

temperature drops to 125°C.

Overtemperature detection functions only when the control

input is enabled (output MOSFET is on). Both MIC2506

outputs are shut off during overtemperature, and both flags

will go low.

Undervoltage Lockout

UVLO (undervoltage lockout) prevents the output MOSFET

from turning on until VIN (input voltage) exceeds 2.5V typical.

After the switch turns on, if VIN drops below 2.3V typical,

UVLO shuts off the output MOSFET and turns the fault flag

on (active low) until VIN drops below 1.5V.

Undervoltage detection functions only when the control input

is enabled (output MOSFET is on).

Overcurrent Limit

The overcurrent limit is preset internally. The preset level

prevents damage to the output MOSFET but allows a mini-

mum current of 2A through the output MOSFET of the

MIC2505-series and 1A for each output MOSFET of the

MIC2506. Output current is monitored by sensing the voltage

drop across the output MOSFET drain metal resistance.

Overcurrent detection functions only when the control input is

enabled (output MOSFET is on) and VIN is above the UVLO

threshold.

Open-Load Detection

Open-load detection is available only on the MIC2505 and

MIC2506. The open-load detection feature is not included in

the MIC2505-1 or -2 versions.

Open-load detection indicates the absence of an output load

by activating the fault flag. Open-load detection is optional

and is enabled by connecting a high-value pull-up resistor

between IN and OUT. If there is no load, the circuit detects a

high OUT (output) voltage (typically ≥1V) and signals the fault

flag. Under normal conditions, the low resistance of a typical

load pulls OUT low. Open-load detection functions only when

the control input is low (output MOSFET is off).

Fault Flag

FLG is an N-channel, open-drain MOSFET output. The fault-

flag is active (low) for one or more of the following conditions:

open load (except MIC2505-1 and -2 versions), undervolt-

age, current limit, or thermal shutdown. The flag output

MOSFET is capable of sinking a 10mA load to typically

100mV above ground.

April 1998 9 MIC2505/2506

MIC2505/2506 Micrel

Applications Information

Supply Filtering

A 0.1µF to 1µF bypass capacitor from IN to GND, located at

the device is strongly recommended to control supply tran-

sients. Without a bypass capacitor, an output short may

cause sufficient ringing on the input (from supply lead induc-

tance) to destroy the internal control circuitry.

Input transients must not exceed the absolute maximum

supply voltage (VIN max = 7.5V) even for a short duration.

OFF

MIC2505BM

CTL OUT

FLG

GND OUT

GATE IN

0.1µF to 1µF

2.7V to 7.5V

Figure 1. Supply Bypassing

The bypass capacitor may be omitted only if board design

precautions are followed, such as using extremely short

supply leads or power and ground planes.

Control Input

CTL must be driven logic high or logic low, or be pulled high

or low for a clearly defined input. Floating the input may cause

unpredictable operation. Add a diode clamp if negative spikes

may occur. See Figure 2.

Open-Load Detection

Refer to “Typical Applications” (first page). Open-load detec-

tion is available only on the MIC2505 and MIC2506. For USB

power distribution applications, the open-load detection fea-

ture is not included in the MIC2505-1 or -2 versions.

The optional open-load detection resistor supplies a small

pull-up current to the load when the output switch is off. (A

100k resistor will draw 50µA from a 5V supply.) Normally, the

load dominates, pulling OUT low. If the load is absent, the

optional resistor pulls OUT high, activating the fault flag if CTL

is off.

When a load is switched off with CTL, capacitance on the

output may cause the open-load function to pull the flag low

until the capacitor is discharged below approximately 2.4V.

Omit the pull-up resistor when open load detection is not

required and for minimum off-state supply current.

Power Bus Switch

The MIC2505/6 family features a MOSFET reverse current

flow prevention circuit. This prevents current from flowing

backwards (from OUT to IN) when CTL is disabled as long as

VIN is above UVLO minimum. In Figure 2, when U1 is on and

U2 is off, this feature prevents current flow from the load (5V)

backward through U2 to the 3.3V supply. (If a discrete

MOSFET and driver were used, the MOSFET’s internal body

diode would short the 5V load to the 3.3V supply.)

FLG will be active (low) on any switch that is off whenever the

load voltage is greater than the open load threshold (approxi-

mately 1V) except for MIC2505-1 and MIC2505-2.

Logic-High = 5V Output

Logic-Low = 3.3V Output

MIC2505BM

Load

CTL OUT

FLG

GND OUT

GATE IN

+5V

0.1µF

MIC2505BM

CTL OUT

FLG

GND OUT

GATE IN

+3.3V

0.1µF

1N4148

(optional)

Figure 2. 5V/3.3V Switch Concept

This circuit’s function would otherwise require a dual driver,

two MOSFETs, plus two diodes (or a dual driver plus four

MOSFETs).

Hot Plug-In Applications (Soft-Start)

The MIC2505/6 family can be used to protect the socket-side

and card-side of a supply circuit from transients caused when

a capacitive load is connected to an active supply.

The switch presents a high impedance when off, and slowly

becomes a low impedance as it turns on. This reduces the

inrush current and related voltage drop that result from

charging a capacitive load.

MIC2505BM

CTL OUT

FLG

GND OUT

GATE IN

0.1µF

Capacitive

Load

3.3V Power Control

Circuitry

GND CardSocket

Figure 3. Hot Plug-In Concept

A gate capacitor may be added to the MIC2505 to slow the

turn on time even more, reducing the inrush current. See

“MIC2505 Turn-On Delay” graph. The UVLO feature insures

that each time the card is removed and VIN = 0 that the gate

of the output switch is discharged to zero volts. A controlled

turn-on is executed each time a board is plugged in, even with

multiple insertions.

MIC2505/2506 Micrel

MIC2505/2506 10 April 1998

Applications Information

USB Application

Figure 4 depicts a low cost and robust implementation of a

four-port, self-powered USB hub circuit employing ganged

overcurrent protection.

ON/OFF

OVERCURRENT

MIC2505-2/-13.3V USB Controller

BUS

D+

D–

GND

BUS

D+

D–

GND

100k

MIC5203-3.3

MIC5207-3.3

LDO Regulator

IN OUT

GND

33µF

Ferrite

Bead

BUS

D+

D–

GND

D+

D–

V+ EN OUT

FLG IN

GND OUT

GATE IN

Bold lines indicate

0.1" wide, 1-oz. copper

high-current traces.

Downstream

USB

Port 1

500mA max.

33µF

BUS

D+

D–

GND

Data

BUS

D+

D–

GND

33µF

0.01µF

4.7

µF

1.0

µF

GND

0.1µF

4.45V to 5.25V

3.5A max.

(+)

(–)33µF

Downstream

USB

Port 2

500mA max.

Downstream

USB

Port 3

500mA max.

Downstream

USB

Port 4

500mA max.

Figure 4. Ganged-Switch Self-Powered Hub

April 1998 11 MIC2505/2506

MIC2505/2506 Micrel

Package Information

0.380 (9.65)

0.370 (9.40)

0.135 (3.43)

0.125 (3.18)

PIN 1

DIMENSIONS:

INCH (MM)

0.018 (0.57)

0.100 (2.54)

0.013 (0.330)

0.010 (0.254)

0.300 (7.62)

0.255 (6.48)

0.245 (6.22)

0.380 (9.65)

0.320 (8.13)

0.0375 (0.952)

0.130 (3.30)

8-Pin Plastic DIP (N)

45°

0°–8°

0.244 (6.20)

0.228 (5.79)

0.197 (5.0)

0.189 (4.8) SEATING

PLANE

0.026 (0.65)

MAX)

0.010 (0.25)

0.007 (0.18)

0.064 (1.63)

0.045 (1.14)

0.0098 (0.249)

0.0040 (0.102)

0.020 (0.51)

0.013 (0.33)

0.157 (3.99)

0.150 (3.81)

0.050 (1.27)

TYP

PIN 1

DIMENSIONS:

INCHES (MM)

0.050 (1.27)

0.016 (0.40)

8-Pin SOP (M)

MIC2505/2506 Micrel

MIC2505/2506 12 April 1998

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.