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UD05104A Datasheet Preview

UD05104A Datasheet

1MHz SYNCHRONOUS STEP-DOWN DC/DC CONVERTER

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UNISONIC TECHNOLOGIES CO., LTD
UD05104A
Preliminary
LINEAR INTEGRATED CIRCUIT
5V, 1A, 1MHz
SYNCHRONOUS STEP-DOWN
DC/DC CONVERTER
DESCRIPTION
The UTC UD05104A is a 1A high frequency synchronous
Step Down DC/DC converter using constant frequency, current
mode architecture. The device integrates main switch and
synchronous rectifier switch for high efficiency without an external
schottky diode. To maximize light load efficiency, The UTC
UD05104A draws only 30μA quiescent current to improve light
load efficiency. In shutdown, The UTC UD05104A reduces supply
current less than 1μA. The UTC UD05104A can supply 1A of load
current from 2.5V to 6.0V input voltage. The output voltage can
be regulated as low as 0.6V. The switching frequency is internally
set at 1MHz, as for operation mode: UTC UD05104A is automatic
PSM/PWM mode.
The UTC UD05104A has built-in internal Soft Start, Short
Circuit Protection and OTP functions, allowing the use of small
surface mount inductors and capacitor.
FEATURES
* Input Voltage Range from 2.5V to 6.0V
* +/-2% 0.6V Feedback Voltage Accuracy
* 1MHz Switching Frequency
* Continuous Output Current up to 1A
* Low Quiescent Current of 30µA
* 0.1μA Shutdown Current
* 100% Duty Cycle Operation
* Built-in 170m/150mPower Switch
* Internal Soft-Start
* Cycle-by-Cycle Current Limit Protection
* Over-Load and Hiccup Mode Short Circuit
* Thermal Shutdown Protection
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UD05104AG-AF5-R
UD05104AG-AF5-R
Package
SOT-25
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
1 of 5
QW-R115-023.a




UTC

UD05104A Datasheet Preview

UD05104A Datasheet

1MHz SYNCHRONOUS STEP-DOWN DC/DC CONVERTER

No Preview Available !

UD05104A
MARKING
Preliminary
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
FB VIN
54
1 23
EN GND SW
PIN DESCRIPTION
PIN NO
1
2
3
4
5
PIN NAME
EN
GND
SW
VIN
FB
DESCRIPTION
Regulator Enable Control Input, Don’t float this PIN
* Drive EN High Level to turn on the converter
* Drive EN Low Level to turn off the converter
Ground
Power Switches Node
Main Input Supply Voltage
Voltage Feedback
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R115-023.a


Part Number UD05104A
Description 1MHz SYNCHRONOUS STEP-DOWN DC/DC CONVERTER
Maker UTC
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UD05104A Datasheet PDF






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