TPS2140 Datasheet, PDF (11/25 Pages) Texas Instruments – ADJUSTABLE LDO AND SWITCH WITH DUAL CURRENT LIMIT FOR USB HIGH-POWER PERIPHERAL POWER MANAGEMENT

PARAMETER MEASUREMENT INFORMATION
TPS2140, TPS2141
TPS2150, TPS2151
SLVS399 – JANUARY 2002
VO(SW_OUT)
CL
IO
VO(LDO_OUT)
CL
IO
LOAD CIRCUIT
VOLTAGE WAVEFORMS
LOAD CIRCUIT
SW_EN
tpd(on)
VO(SW_OUT)
50%
50%
VDD
GND
tpd(off)
90%
10%
VI(SW_IN)
GND
Propagation Delay (SW_OUT)
LDO_EN
tpd(on)
VO(LDO_OUT)
50%
50%
VDD
GND
tpd(off)
90%
10%
V(SET)
GND
Propagation Delay (LDO_OUT)
tr
tf
VO(SW_OUT)
90%
10%
Rise/Fall Time (SW_OUT)
VI(SW_IN)
GND
tr
tf
VO(LDO_OUT)
90%
10%
Rise/Fall Time (LDO_OUT)
V(SET)
GND
SW_EN
50%
50%
ton
VO(SW_OUT)
90%
10%
VDD
GND
toff
VI(SW_IN)
GND
LDO_EN
ton
VO(LDO_OUT)
50%
50%
90%
10%
VDD
GND
toff
V(SET)
GND
Turn On/Off Time (SW_OUT)
Turn On/Off Time (LDO_OUT)
Figure 1. Test Circuits and Voltage Waveforms
Current
Meter
DUT
IN
+
OUT A
Figure 2. Current Limit Test Circuit
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