AAT2138 Datasheet, PDF (10/18 Pages) Skyworks Solutions Inc. – High Current Step-Down Converter with High-Precision Programmable Current Limited Load Switch

DATA SHEET
AAT2138
High Current Step-Down Converter
with High-Precision Programmable Current Limited Load Switch
Typical Characteristics
Load Switch Enable Threshold vs Temperature
1.3
1.2
1.1
1
0.9
0.8
V_ENH
V_ENL
0.7
-40
-15
10
35
60
85
Temperature (°C)
Load Switch R_DS(ON) vs Input Voltage
140
85°C
120
25°C
-40°C
100
80
60
40
3.1 3.4 3.7
4
4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Load Switch Turn on
(V_SYSIN = 5V, C_SYSIN = 1μF, C_REGIN = 10μF + 0.1μF, RL = 100Ω)
(V_OUT = 3.4V)
V_ENSYS
2V/div
0V
V_REGIN
2V/div
V_OUT
2V/div 0V
0V
I_IN
0A
500mA/div
Time 400μS/div
Load Switch Turn off
(V_SYSIN = 5V, C_SYSIN = 1μF, C_REGIN = 10μF + 0.1μF, R_L = 100Ω)
(V_OUT = 3.4V)
V_ENSYS
2V/div
V_REGIN
0V
2V/div
V_OUT
2V/div
0V
0V
I_IN
50mA 0A
/div
Time 1ms/div
Load Switch Turn On
(V_SYSIN = 5V, C_SYSIN = 1μF, C_REGIN = 10μF + 0.1μF + 680μF, R_L = 100Ω)
(V_OUT = 3.4V)
V_ENSYS
2V/div
0V
V_REGIN
5V/div _0V
V_OUT
2V/div 0V
I_IN
500mA/div
0A
Time 2ms/div
REGIN Discharge Function
(V_SYSIN from 5V to 3V, C_SYSIN = 1μF, C_REGIN = 10μF + 0.1μF)
V_SYSIN
2V/div
V_REGIN ^0V
2V/div
0V
Time 400μs/div
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
10
202006C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013