Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UD05202
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LINEAR INTEGRATED CIRCUIT
HIGH EFFICIENCY 1MHZ,
DUAL 2A SYNCHRONOUS
STEP DOWN REGULATOR

DESCRIPTION
The UTC UD05202 is a high-efficiency 1MHz synchronous
step-down DC-DC regulator IC capable of delivering up to 2A
output current. The UTC UD05202 operates over a wide input
voltage ranging from 3V to 5.5V and integrate main switch and
synchronous switch with very low RDS(ON) to minimize the
conduction loss.
Low output voltage ripple and small external inductor and
capacitor sizes are achieved with 1MHz switching frequency.

HSOP-8
FEATURES
* Low RDS(ON) for internal switches (top/bottom) 180mΩ/120mΩ
* 3~5.5V input voltage range
* 1MHz switching frequency minimizes the external components
* Internal soft-start limits the inrush current
* 100% dropout operation
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ORDERING INFORMATION
Ordering Number
UD05202G-SH2-R
Package
HSOP-8
Packing
Tape Reel
UD05202G-SH2-R
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(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) SH2: HSOP-8
(3)Green Package
(3) G: Halogen Free and Lead Free
MARKING
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Copyright © 2015 Unisonic Technologies Co., Ltd
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UD05302
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PIN CONFIGURATION
IN1 1
8 FB1
LX1 2
7 EN1
IN2 3
LX2 4
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LINEAR INTEGRATED CIRCUIT
GND
6 FB2
5 EN2
PIN DESCRIPTION
PIN NO.
1, 3
2, 4
7, 5
PIN NAME
IN1,2
LX1,2
EN1,2
8, 6
FB1,2
DESCRIPTION
Input pin. Decouple this pin to GND paddle with at least 10uF ceramic cap
Inductor pin. Connect this pin to the switching node of inductor
Enable control. Pull high to turn on. Do not float.
Output Feedback Pin. Connect this pin to the center point of the output resistor
divider (as shown in Figure 1) to program the output voltage: VOUT=0.6*(1+R1/R2)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Input Voltage
6
V
Enable, FB Voltage
VIN+0.6
V
Power Dissipation
TA=25°C
PD
1
W
Junction Temperature Range
TJ
150
°C
Storage Temperature Range
TSTG
-65~150
°C
HBM (Human Body Mode)
2
kV
ESD Susceptibility (Note 1)
MM (Machine Mode)
200
V
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.

RECOMMENDED OPERATING CONDITIONS (Note 2)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Input Voltage
3~5.5
V
Junction Temperature Range
TJ
-40~125
°C
Ambient Temperature Range
TA
-40~85
°C
Note: θJA is measured in the natural convection at TA=25°C on a low effective single layer thermal conductivity test
board of JEDEC 51-3 thermal measurement standard.

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATINGS
50
10
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(VIN=5V, VOUT=2.5V, L=2.2μH, COUT=10μF, TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage Range
VIN
3
5.5
V
Quiescent Current
IQ
IOUT=0, VFB=VREF×105%
80
µA
Shutdown Current
ISHDN
EN=0
10
µA
Feedback Reference Voltage
VREF
0.588
0.6
0.612
V
FB Input Current
IFB
VFB=VIN
-50
50
nA
PFET RON
RDS(ON)_P
0.18
Ω
NFET RON
RDS(ON)_N
0.15
Ω
PFET Current Limit
ILIM
3.5
A
EN Rising Threshold
VENH
1.5
V
EN Falling Threshold
VENL
0.4
V
Input UVLO Threshold
VUVLO
2.9
V
UVLO Hysteresis
VHYS
0.15
V
Oscillator Frequency
FOSC
IOUT=100mA
1
MHz
Min ON Time
50
ns
Max Duty Cycle
100
%
Thermal Shutdown Temperature
TSD
150
°C
Notes: 1. θJA is measured in the natural convection at TA=25°C on a low effective single layer thermal conductivity
test board of JEDEC 51-3 thermal measurement standard.
2. The device is not guaranteed to function outside its operating conditions.
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www.unisonic.com.tw
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LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
VIN
CIN
L1
VOUT1
COUT1
IN1
LX1
IN2
VOUT2
LX2
R3
R1
FB1
R2
L2
EN
Control
EN1
EN2
FB2
COUT2
R4
GND
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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