ƹ90% Efficiency
ƹHigh Supply Capability to Deliver 5.0V 500mA
with input 3.6V-4.2V
ƹ14µA Quiescent (switch-off) Supply Current
ƹ500KHz Fixed Switching Frequency
ƹZero Shutdown Mode Supply Current
ƹProviding Flexibility for Using Internal and
External Power Switches
ƹ1.0V Low Start-up Input Voltage
ƹSmall SOT-26 & SOT89-5 Package
iency maintains long battery lifetime. 䂓Orderin
g
Information
Item Package Shipping
SOT89-5 KB3301MR SOT-26 3000pcs/Reel&Tape
KB3301PR SOT-89-5 3000pcs/Reel&Tape
䂓Packa
g
e Information
ƹLCD Panel
ƹDSC
ƹMP3
ƹWireless Equipment
ƹPortable Instrument
ƹPDA
SOT89-5 SOT-26
䂓Pin Confi
g
urations
SOT-26 SOT-89-
5
Pin Nam
e
Pin Function
1 1 CE Chip enable
2 EXT Output
3 5 GND Ground
4 4 LX Switching
5 2 VDD Input
6 3 FB Feedback input 1.25V
up to 300mA output current. The 500KHz high switching
The low start-up input voltage below 0.8V makes KB3301
the 14µA low quiescent current together with high effic-
The KB3301 is available in small package SOT-26 and
The KB3301 is a small, high efficiency, and low voltage
step-up DC/DC converter with an Adaptive Current Mode
PWM control loop, includes an error amplifier, ramp
rate minimized the size of external components. Besides,
over a wide range of load currents. It operates in stable
waveforms without external compensation.
suitable for 1 to 4 battery cells applications of providing
Step-up DC/DC converter
generator, comparator, switch pass element and driver
in which providing a stable and high efficient operation
Vin 3.3~10uH
L1
CE
EXT
VDD
GND
FB
LX
C3
100uF
C1
100uF
+
R1
1.6M/100K
1N5819
Vout
3.3V/5V
+
D1
R2
980k/33K
1uF
C2
P1 / 5
KB3301
KB3301
Note:Vin=3.6~4.2V, Vout=5.0V 500mA ( USB host application )
General Description Features
Applications
Typical Application Circuit
Symbol Descripation
㽲㪈 Step-up DC-DC Converter
㽳 KB3301
㽴㽵 Control Code
SOT-26 SOT-89-5
Vin 10uH
L1
C4
102uF
R1
1.6M/100K
1N5819
Vout
3.3V/5V
D1
CE
EXT
VDD
GND
FB
LX
C3
100uF
+
C1
100uF
+
˔C5
106uF
R2
980K/33K
I(V
DD)
R3
100
C2
1uF
˔
I(V
i
n
)
P2 / 5
3
01
KB3301
KB3301
KB3301
Function Block Diagram
Marking Information Test Circuit
(
Ta=25㷄
㷄㷄
㷄䋩
䋩䋩
䋩
Paramenter Symbol Ratings Unit
Supply Voltage Vin - 0.3V 䌾 7V V
LX Pin Switch Voltage 㪭㪣㪯 - 0.3 䌾 (VDD + 0.8V) V
Other I/O Pin Voltages 㪭㫊㫊 - 0.3V 䌾 (VDD + 0.3V) V
Lx Pin Switch Current 㪠㪣㪯 2.5 A
EXT Pin Driver Current 㪠㪜㪯㪫 200 mA
Package Thermal Resistance SOT-26 Pd 145 㷄/W
SOT-89-5 45 㷄/W
Operating Junction Temperature Tj 125 㷄
Storage Temperature Range 㪫㫊㫋㪾 - 65 ~ +150 㷄
(
Vin =1.5V
,
VDD=3.3V
,
I=0
,
Ta = 25ć
,
unless otherwise s
p
ec
Parameter Symbol Test Conditions Min Typ Max Units
Start-UP Voltage VST IL = 1mA V
Operating VDD Range VDD VDD pin voltage V
No Load Current I (VIN)I
NO LOAD VIN = 1.5V, VOUT = 3.3V µA
Switch-off Current I (VDD) ISWITCH OFF VIN = 6V µA
Shutdown Current I (VIN)I
OFF CE Pin = 0V, VIN = 4.5V µA
Feedback Reference Voltage VREF Close Loop, VDD = 3.3V V
Switching Frequency FSVDD = 3.3V KHz
Maximum Duty DMAX VDD = 3.3V %
LX ON Resistance VDD = 3.3V Ω
Current Limit Setting ILIMIT VDD = 3.3V A
EXT ON Resistance to VDD VDD = 3.3V Ω
EXT ON Resistance to GND VDD = 3.3V Ω
Line Regulation ƸVLINE VIN = 1.5 ~ 2.5V, IL = 1mA mV/V
Load Regulation ƸVLOAD VIN = 2.5V, IL = 1 ~ 100mA mV/mA
CE Pin Trip Level VDD = 3.3V V
Temperature Stability for Vout TSppm/ć
Thermal Shutdown TSD ć
Thermal Shutdown Hysterises ƸTSD ć
* Note: The CE pin shall be tied to VDD pin and inhibit to act the ON/OFF state whenever the VDD pin voltage
may reach to 5.5V or above.
-- 0.80 0.85
2--6.5
-- 75 --
-- 14 --
-- 0.01 1
1.225 1.25 1.275
-- 500 --
-- 95 --
5--
-- 0.3 --
-- 2
5--
--
0.8 1.2
0.25 --
50
0.4
-- 165
-- 10 --
--
--
--
--
--
--
-- 10 --
P3 / 5
KB3301
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
䃂High Current Application 䃂Output Voltage Setting
switching regulator (VOUT) can be set
R1
R2
䃂Feedback Loop Design
ƹFollow Equation A
ƹ
recommended.
ƹ
ƽHigh Voltage Application leakage, and improper probing to FB pins.
ƹ
to hundreds KΩ.
ƽMulti-Output Applications
䊶䊶䊶㪘
Referring to application circuits, The selection of R1and
VOUT1 = (1 + ) × 1.25V
R2 based on the trade-off between quiescent current
consumption and interference immunity is stated below:
Higher R reduces the quiescent current (Path current
Referring to application circuits, the output voltage of the
=1.25V/R2), however resistors beyond 5MΩare not
Lower R gives better noise immunity, and is less
sensitive to interference, layout parasitics, FB node
A proper value of feed forward capacitor parallel with
suspend modes, the higher values of R1and R2 are
R1 can improve the noise immunity of the feedback
loops, especially in an improper layout. An empirical
suggestion is around 0~33pF for feedback resistors
of MΩ, and 10nF~0.1µF for feedback resistors of tens
For applications without standby or suspend modes,
lower values of R1 and R2 are preferred. For applications
concerning the current consumption in standby or
feedback needed. Such "high impedance loops" are
sensitive to any interference, which require careful
layout and avoid any interference, e.g. probing to FB pin.
CE
EXT
VDD
GND FB
LX
L1
3.3--10uH
C2
1uF
C5
100uF
D1
C1
100uF
1N5819
Vin
Q1
NMOS
Vout
3.3V/5V
R1
1.6M/100K
R2
980k/33K
+
+
CE
EXT
VDD
GND FB
LX
L1
4.7uH 2.5A
R1
R2 C2 C1
C3
CVDD
C4
47uF
D1
RVDD
47
˥ˠ
12V / 9V / 8V
1000mA
Vin=3.1VД
6.5V Vout=12V
+1N5819
Vin=2.8V~
Д
6.5V Vout=9V
+
Q1
NMOS
CVDD=1uF
RM=0.2
C3=NC
R1=860K/620K/210K
R2=100K/100K/39K
C1=47uF
C2=10uF
R2=100
R1=620K
C6=0.1uF
CE
EXTVDD
GND FB
LX
L1
3.3--10uH
C3
10uF
C1
1uF
D1
C4
10uF
1N5819
Vin
3.3V/5V Vout2
+18V 10mA
R1
R3
100
C2
10uF
Q1
NMOS
C5
10uF
R2
C6
C7
1uF
C8
1uF Vout1
+9V 100mA
Vout3
-9V 10mA
P4 / 5
KB3301
KB3301
KB3301
KB3301
Applications Application Note
Vin=4.0V 6.5V Vout=8V
XP161A1355PR FDN337N
NMOS=
䃂SOT-89-5
Units: mm
Symbol Min Max
A 1.400 1.600
b 0.360 0.520
B 2.400 2.600
b1 0.406 0.533
C -- 4.250
C1 0.800 --
D 4.400 4.600
D1 -- 1.700
e 1.400 1.600
H 0.380 0.430
䃂SOT-26
Units: mm
Symbol Min Max
A 0.889 1.295
A1 -- 0.152
B 1.397 1.803
b 0.356 0.559
C 2.591 2.997
D 2.692 3.099
e 0.838 1.041
H 0.102 0.254
L 0.356 0.610
P5 / 5
1301
KB3301
PACAGE DESCRIPTION
