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UNISONIC TECHNOLOGIES CO., LTD
P34563
Preliminary
LINEAR INTEGRATED CIRCUIT
PWM CONTROL 3A
STEP-DOWN CONVERTER
DESCRIPTION
The UTC P34563 consists of step-down switching regulator
with PWM control.
The UTC P34563 provides low-ripple power, high efficiency,
and excellent transient characteristics. The PWM control circuit is
able to the duty ratio linearly forms 0 up to 100%. With the
addition of an internal P-channel Power MOS, and a diode
connected externally, these ICs can function as step-down
switching regulators. They serve as ideal power supply units for
portable devices when coupled with the HSOP-8 package,
providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to
40V.
FEATURES
* Input voltage: 8V~40V
* Oscillation frequency: 100K/350KHz
* Duty ratio: 0%~100% PWM control
* Adjustable version output voltage range from 3.3V to 38V
* Enable and auto restart function.
* Short Circuit Protect (SCP).
* Thermal Shutdown function / Internal OVP.
* Built-in internal SW P-channel MOS.
ORDERING INFORMATION
Ordering Number
P34563G-SH2-R
Package
HSOP-8
Packing
Tape Reel
P34563G-SH2-R
MARKING
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) SH2: HSOP-8
(3) G: Halogen Free and Lead Free
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Copyright © 2015 Unisonic Technologies Co., Ltd
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P34563
PIN CONFIGURATION
Preliminary
EN/CT 1
VSS 2
VGATE 3
VCC 4
SW
LINEAR INTEGRATED CIRCUIT
8 FB
7 SENSE2
6 SENSE1
5 SW
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
EN/CT
VSS
VGATE
VCC
SW
SENSE1
SENSE2
FB
ON/OFF and auto restart control
GND pin
Driver gate clamping pin.
Operating voltage input
Switch pin.
Current sense input1
Current sense input2
Feedback pin
DESCRIPTION
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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P34563
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified.)
PARAMETER
SYMBOL
RATINGS
UNIT
VCC Pin Voltage
Feedback Pin Voltage
VCC VSS -0.3~VSS+45
VFB VSS-0.3~38
V
V
EN/CT, OVP Pin Voltage
SENSE1,SENSE2 Pin Voltage
VSS-0.3~6
VSS-0.3~38
V
V
Switch Pin Voltage
Power Dissipation
VSW
PD
VSS-0.3~VCC+0.3
(TJ -TA)/ θJA
V
W
Operating Supply Voltage
Output Current
VOP +8~+40
IOUT 0~3
V
A
Operating Temperature
TOPR
-20~+125
°C
Storage Temperature
TSTG
-40~+165
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL CHARACTERISTICS
PARAMETER
Junction to Ambient
Junction to Case
SYMBOL
θJA
θJC
RATINGS
143
15
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
PARAMETER
FB
Under Voltage Lockout
UVLO Hysteresis
OVP Detect Voltage
Line Regulation
Load Regulation
Quiescent Current
Oscillator Frequency
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Internal MOSFET RDSON
Sense Voltage
Sense Voltage Hysteresis
EN/CT Pin Logic Input Threshold
Voltage
EN/CT Pin Current
EN/CT Pin Current
Thermal Shutdown Temp
Thermal Shutdown Hysteresis
SYMBOL
VFB
UVLO
TEST CONDITIONS
IOUT=10mA
Falling
VOVP
 VOUT
 VOUT
ICCQ
FOSC
DC
RDSON
VSENSE
VSENSE-h
VEN
VCT
IEN/CT-C
IEN/CT-D
TSD
TSH
FB Floating
VCC=10~40V
IOUT=0~1A, RSENSE=140m
VFB>1.2V
Force Driver On VFB=0.7V
Force Driver Off VFB=1.2V
VCC=12V, VFB = 0.7V
VSENSE1-VSENSE2
Shutdown Mode
Auto Restart, VFB<0.4V
Charge Current
Discharge Current
MIN TYP MAX UNIT
1.08 1.10 1.12 V
6V
0.8 V
1.250
V
0.5 1
%
10 mV
3 7 mA
80 100 120 KHz
100 %
0%
110 170 m
150 mV
45 mV
0.3 V
0.5 1.5 V
-32 µA
1.5 µA
160 °C
40 °C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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P34563
Preliminary
TYPICAL APPLICATION CIRCUIT
AL CAPACITOR
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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