UM3501_15 Datasheet, PDF (4/11 Pages) Union Semiconductor, Inc. – 600mA, 1.2MHz, Synchronous Step-Down DC-DC Converter

UM3501
Electrical Characteristics (continued)
(V_IN=V_EN=3.6V, T_A=+25℃, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min
Typ
Max Unit
V_EN=0V,
I_SWL
SW Leakage
V_IN=5V ;
±0.01
±1
μA
V_SW=0V or 5V
V_H
EN High-Level
Threshold
-40ºC ≤T_A ≤ 85ºC
1.0
V
V_L
EN Low-Level
Threshold
-40ºC ≤T_A ≤ 85ºC
0.4
V
I_ENL
EN Leakage Current
±0.1
±1
μA
η_(max)
Max. Efficiency
V_IN=3.6V, V_OUT=2.5V
90
%
Thermal Shutdown
Temperature
160
ºC
Note2: 100% production test at +25ºC. Specifications over the temperature range are guaranteed
by design and characterization.
Typical Performance Characteristics
(V_IN = 3.6V, V_OUT = 1.8V, L1= 2.2µH, C1= 4.7µF, C3= 10µF, T_A = +25°C, unless otherwise
noted.)
Efficiency vs Load Current
Efficiency vs Load Current
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
20
VOUT=1.8V
10
0
VIN=2.5V
VIN=3.6V
VIN=4.2V
VIN=5.5V
30
20
VIN=3.6V
10
0
VOUT=1.2V
VOUT=1.8V
1
10
100
1000
1
Output Current (mA)
10
100
Output Current (mA)
1000
100
90
80
70
60
50
40
30
20
10
0
2.5
Efficiency vs Input Voltage
Output Voltage vs Load Current
1.81
1.80
1.79
1.78
VOUT=1.8V
ILOAD=200mA
ILOAD=400mA
ILOAD=600mA
3.5
4.5
5.5
Input Voltage (V)
1.77
1.76
1.75
1
VIN=2.5V
VIN=3.6V
VIN=4.2V
10
100
Output Current (mA)
1000
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http://www.union-ic.com Rev.06 Feb.2015
4/11