Advanced Power
Electronics Corp.
FEATURES DESCRIPTION
Output Voltage : 3.3V, 5V, 12V and Adjustable
Output Voltage
Adjustable Version Output Voltage Range, 1.23V
to 19.5V+4%
150KHz +15% Fixed Switching Frequency.
Voltage Mode Non-synchronous PWM Control.
Thermal-shutdown and Current-limit Protection.
ON/OFF Shutdown Control Input.
Short Circuit Protect(SCP)
Operating Voltage can be up to 22V
Output Load Current 2A
SOP-8L Package
Low Power Standby Mode.
Built-in Switching Transistor on Chip
RoHS Compliant
1. ADJUSTABLE OUTPUT VOLTAGE VERSION
Data and specifications subject to change without notice 200803104
APE1701
TYPICAL APPLICATION
1
150KHz, 2A PWM BUCK DC/DC CONVERTER
The APE1701 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of driving a
2A load without additional transistor. It saves board space.
The external shutdown function can be controlled by logic level
and then come into standby mode. The internal compensation
makes feedback control having good line and load regulation
without external design. Regarding protected function, thermal
shutdown is to prevent over temperature operating from
damage, and current limit is against over current operating of
the output switch. if current limit function occurs and VFB is
down below 0.5V the switching frequency will be reduced. The
APE1701 series operates at a switching frequency of 150KHz
thus allow smaller sized filter components than what would be
needed with lower frequency switching regulators. Other
features include a guaranteed +4% tolerance on output
voltage under specified input voltage and output load
conditions, and +15% on the oscillator frequency. The output
version included fixed 3.3V, 5V, 12V and an adjustable type.
The chips are available in a standard 8-lead SOP package.
Advanced Power
Electronics Corp.
2. FIXED OUTPUT VOLTAGE VERSION
3. ADJUSTABLE OUTPUT VOLTAGE VERSION WITH DELAYED STARTUP
4. INVERTING -5V REGULATOR WITH DELAYED STARTUP
2
TYPICAL APPLICATION APE1701
Advanced Power
Electronics Corp. APE1701
ABSOLUTE MAXIMUM RATINGS (at TA=25°C)
Maximum Supply Voltage(VCC) +24V
ON/OFF PIN Input Voltage(VEN) -0.3V to VCC
Feedback PIN Voltage(VFB) -0.3V to 16V
Output Voltage to Ground(VOUT) -0.7 to 24V
Power Dissipation(PD) (TJ-TA)/RthJA
Storage Temperature Range(TST) -65°C To 150°C
Operating Temperature Range(TOP) -20°C To 125°C
Operating Supply Voltage(VOP) +4.5V to +22V
Thermal Resistance from Junction to Case(RthJC) 20°C/W
60°C/W
Note. RthJA is measured with the PCB copper area(need connect to SW pins) of approx. 1.5 in2(multi-layers)
PACKAGE INFORMATION ORDERING INFORMATION
APE1701X-XX
M : SOP-8L 33 : 3.3V
50 : 5.0V
12 : 12V
Blank : ADJ
ELECTRICAL SPECIFICATIONS
(VIN=12V, TA=25℃, unless otherwise specified)
Parameter SYM TEST CONDITION MIN TYP MAX UNITS
Quiescent Current ICCQ
VFB= 12V force driver off - 4 8 mA
VFB=1.3V - -10 -50.0
(ADJ Version Only) - -10 -100.0
VEN=5V - 35 100 uA
VCC=22V - 35 100 uA
Pear Current, No outside circuit
VFB=0V force driver on
Max. Duty Cycle (ON) VFB=0V force driver on - 100 - %
Min. Duty Cycle (OFF) VFB=12V force driver off - 0 - %
127 150 173 KHz
110 - 173 KHz
Oscillation Frequency of Short (Adjustable) When VFB < 0.5V KHz
Circuit Protect (Fixed) When < VOUT x 40% KHz
IOUT=2A, No outside circuit 1.4
VFB=0V force driver on 1.5 VSaturation Voltage VSAT - 1.2
FSCP --50
A
DC
FOSC
Oscillation Frequency
Current Limit 2.4 - -
ICL
3
Thermal Resistance from Junction to Ambient(RthJA)
Feedback Bias Current IFB nA
Shutdown Supply Current ISD
SOP-8L (M)
Package type Output Voltage
Advanced Power
Electronics Corp. APE1701
ELECTRICAL SPECIFICATIONS(Cont.)
Parameter SYM TEST CONDITION MIN TYP MAX UNITS
VIH High (regulator ON) 2 - V
VIL Low (regulator OFF) - 0.6 V
ISH VEN=2.5V(OFF) - -0.1 -0.5 uA
ISL
VEN=0.5V(ON) - - -0.01 uA
No outside circuit
VFB=12V force driver on
SW PIN=-0.8V VCC=22V force driver off --5 -mA
Thermal Shutdown Temp. TSD -135 -°C
Version Characteristics Symbol Conditions MIN TYP MAX UNITS
4.5V < VCC < 22V
0.2A < ILOAD <2A
VOUT programmed for 3.3V
ηVCC=12V, ILOAD=2A -80- %
4.75V < VCC < 22V
0.2A < ILOAD <2A
ηVCC=12V, ILOAD=2A -81- %
7V < VCC < 22V
0.2A < ILOAD <2A
ηVCC=12V, ILOAD=2A -85- %
15V < VCC < 22V
0.2A < ILOAD <2A
ηVCC=15V, ILOAD=2A - 91 - %
PIN DESCRIPTIONS
PIN SYMBOL PIN DESCRIPTION
VSS GND Pin
FB Control Voltage Feedback Control for ADJ Version
EN ON/OFF Shutdown
OUT Output Voltage Feedback Control for Fixed Version
SW Switching Output
VCC IC Power Supply Pin
V
VOUT 11.52/
11.4 12 12.48/
12.6
3.3 3.432/
3.465 V
APE1701-5.0V VOUT 4.80/
4.75 5.0 5.20/
5.25 V
SW PIN=0V - - -200
ISWL uA
VFB
APE1701-ADJ 1.193/
1.180 1.23 1.267/
1.280 V
4
EN PIN Logic Input Threshold Volta
g
EN PIN Input Current
1.3
APE1701-3.3V VOUT 3.168/
3.135
APE1701-12V
SW PIN
Leakage
Current
Output
Feedback
Voltage
Efficiency
Efficiency
Output
Voltage
Efficiency
Output
Voltage
Efficiency
Output
Voltage
Advanced Power
Electronics Corp. APE1701
BLOCK DIAGRAM
FUNCTION DESCRIPTION
PIN FUNCTION
VCC
VSS
SW
FEEDBACK
5
This is positive input supply for the IC switching regulator. A suitable input bypass
capacitor must be presented at this pin to minimize voltage transients and to supply
the switching currents needed by the regulator.
Circuit
g
round.
Internal Switch. The voltage at this pin switches between (+VCC - VSAT) and
approximately - 0.5V, with a duty cycle of approximately VOUT / VCC. To minimize
coupling to sensitive circuitry, the PC board copper area connected to this pin should
be minimized.
Senses in the regulated output voltage to complete the feedback loop.
Advanced Power
Electronics Corp. APE1701
FUNCTION DESCRIPTION
EN
THERMAL CONSIDERATIONS
6
Allows the switching regulator circuit to be shutdown using logic level signals thus
dropping the total input supple current to approximately 100uA. Pulling this pin below
a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin
above 1.3V (up to a maximum of VCC) shuts the regulator down. if this shutdown feature
is not needed, the EN pin can be wired to the ground pin.
The SOP-8 package needs a heat sink under most conditions. The size of the
heat sink depends on the input voltage, the output voltage, the load current and the
ambient temperature. The APE1701 junction temperature rises above ambient temperature
for a 2A load and different input and output voltages.
The data for these curves was taken with the APE1701 (SOP-8 package) operating
as a buck-switching regulator in an ambient temperature of 25°C (still air). These
temperature increments are all approximate and are affected by many factors. Higher
ambient temperatures required more heat sinker.
For the best thermal performance, wide copper traces and generous amounts of
printed circuit board copper (need connect to the VSS pins) should be used in the
board layout, (One exception is the SW pin, which should not have large areas of
copper.) to the surrounding air, and moving air lowers the thermal resistance even
further.
Package thermal resistance and junction temperature increments are all approximate.
The increments are affected by a lot of factors. Some of these factors include board size,
shape, thickness, position, location, and even board temperature. Other factors are,
trace width, total printed circuit copper area, copper thickness, single or double-sided,
multi-layer board and the amount of solder on the board.
The effectiveness of the PC board to dissipate heat also depends on the size,
quantity and spacing of other components on the board, as well as whether the
surrounding air is still or moving. Furthermore, some of these components such as the
catch diode will add heat to the PC board and the heat can vary as the input voltage
changes. For the inductor, depending on the physical size, type of core material and
the DC resistance, it could either act as a heat sink taking heat away from the board,
or it could add heat to the board.
7
APE1701
Typical Characteristics
VOUT VS VIN ICCQ VS VIN
VOUT VS VIN
3.15
3.20
3.25
3.30
3.35
3.40
3.45
4 6 8 1012141618202224
Vin(V)
Vout(V)
Iccq V S VIN
0.00
1.00
2.00
3.00
4.00
5.00
6.00
4 6 8 1012141618202224
Vin(V)
Iccq(mA)
FOSC VS VIN
FOSC VS TEMPERATURE
Fosc VS VIN
140
145
150
155
160
165
170
4 6 8 1012141618202224
Vin(V)
Fosc(KHz)
FOSC VS TEM P
120
130
140
150
160
170
180
-20 0 20 40 60 80 100 120
temp (℃)
Vout(V)
VFB VS TEMPERATURE
ICCQ VS TEMPERATURE
VFB VS TEMP
1.18
1.20
1.22
1.24
1.26
1.28
-20 0 20 40 60 80 100 120
temp (℃)
Vout(V)
I CCQ VS TEMP
0.00
1.00
2.00
3.00
4.00
5.00
6.00
-20 0 20 40 60 80 100 120
temp (℃)
Vout(V)
Advanced Power
Electronics Corp.
8
APE1701
Typical Characteristics
Output Ripple
(V
IN=12V, VOUT=3.3V, IOUT=2A)
Power on test wave
(VIN=12V, VOUT=5V, IOUT=2A )
Load Transient Response
(V
IN=12V, VOUT=5V, IOUT=0.1~2A)
EN on test wave
(VIN=12V, VOUT=5V, IOUT=2A )
Efficiency
(VIN=12V, VOUT=3.3V)
Efficiency
(VIN=12V, VOUT=5.0V)
Vin=12V
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
0.0 0.5 1.0 1.5 2.0
Iout(A)
Efficiency(%)
Vin=12V
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
0.0 0.5 1.0 1.5 2.0
Iout(A)
Efficiency(%)
SW
I
SW
SW
I
SW
V
OUT
V
IN
V
OUT
(AC)
SW
I
SW
V
OUT
(AC)
SW
I
SW
V
OUT
V
IN
Advanced Power
Electronics Corp.
Package Outline : SOP-8L
Millimeters
SYMBOLS MIN NOM MAX
A 1.35 1.55 1.75
A1 0.10 0.18 0.25
B 0.33 0.41 0.51
C 0.19 0.22 0.25
D 4.80 4.90 5.00
E1 3.80 3.90 4.00
E 5.80 6.15 6.50
L 0.38 0.71 1.27
θ0 4.00 8.00
e
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : SOP-8L
1.27 TYP
ADVANCED POWER ELECTRONICS CORP.
c
DETAIL A
A1
A
1701M-XX
YWWSSS
Part Numbe
r
DETAIL A Lθ
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
e
B
134
5678
2
D
E1 E
Package Code
Output Voltage
9
