UM3502QA Datasheet, PDF (4/13 Pages) Union Semiconductor, Inc. – Low-Profile, 600mA, Synchronous Step-Down Converter with Integrated Inductor

UM3502QA
Electrical Characteristics (Continued)
(V_IN=V_EN=3.6V, T_A=+25°C, C_IN=4.7μF, C_OUT=10μF, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min
Typ
Max Unit
I_SWL
SW Leakage
V_EN=0V, V_IN=5V,
V_SW=0V or 5V
±0.01
±1
μA
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
Thermal Shutdown
Trip Point Hysteresis
25
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, C_IN=4.7μF, C_OUT=10μF, T_A=+25°C, unless otherwise noted.)
100
90
80
70
60
50
40
30
20
10
0
1
Efficiency vs Load Current
V_VI_IN_N=₌2₂._.5₅V_V
V_VI_IN_N=₌3₃._.6₆V_V
VV_VVII_IINN_NN==₌₌45₄₅.._..25₂₅VV_VV
10
100
Output Current (mA)
1000
100
90
80
70
60
50
40
30
20
10
0
1
Efficiency vs Load Current
VOOUUT=T1=.12.V2V
V_VO_OU_UT=_T1₌.₁8_.V_8V
10
100
Output Current (mA)
1000
Efficiency vs Input Voltage
Output Voltage vs Load Current
100
1.81
90
80
1.80
70
1.79
60
50
1.78
40
30
20
10
0
2.5
VOUT=1.8V
IILL^IILLOO^OOAAAA^DDDD⁼⁼==²⁴24⁰⁰00⁰⁰00^mmmm^AAAA
IL^ILO^OAA^DD⁼=⁶6⁰0⁰0^mm^AA
3.5
4.5
5.5
Input Voltage (V)
1.77
1.76
1.75
1
VVV_VVVIIINNN_IIINNN===₌₌₌234₂₃₄...562_...562VVV_VVV
10
100
Output Current (mA)
1000
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http://www.union-ic.com Rev.01 Nov.2015
4/13