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TPS2140 Datasheet(PDF) 3 Page - Texas Instruments

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Part # TPS2140
Description  ADJUSTABLE LDO AND SWITCH WITH DUAL CURRENT LIMIT FOR USB HIGH-POWER PERIPHERAL POWER MANAGEMENT
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS2140 Datasheet(HTML) 3 Page - Texas Instruments

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TPS2140, TPS2141
TPS2150, TPS2151
SLVS399 – JANUARY 2002
3
www.ti.com
functional block diagram
CS
2-Level
Current
Limit
Driver
SW_OUT
VREF
VREF
VCC
Select
Charge
Pump
Thermal
Sense
0.9 V to 3.3 V
250 mA
LDO
SW_IN
LDO_IN
SW_EN†
LDO_EN
GND
SW_OUT
SW_PG
SW_PLDN
LDO_PG
ADJ
LDO_OUT
LDO_PLDN
† The pin is active low for TPS2140 and TPS2141, with an internal pullup.
The pin is active high for TPS2150 and TPS2151, with an internal pulldown.
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
ADJ
9
I
Feedback adjustment of LDO regulator to set output voltage
GND
7
Ground
LDO_EN
6
I
Enable signal for LDO regulator, active high, no internal pullup or pulldown
LDO_IN
4
I
Input of LDO regulator
LDO_OUT
11
O
Output of LDO regulator
LDO_PG
8
O
Power good signal for LDO output, open-drain, active high
LDO_PLDN
10
I
Output pulldown pin used for LDO when connected to LDO_OUT
SW_EN or
SW_EN
5
I
Active-high enable for switch on TPS2150 and TPS2151 devices with internal pulldown
Active-low enable for switch on TPS2140 and TPS2141 devices with internal pullup
SW_IN
2, 3
I
Input of the switch
SW_OUT
12, 13
O
Output of switch
SW_PG
1
O
Power good signal for switch output, active high logic-level signal, no external pullup required.
SW_PLDN
14
I
Output pulldown pin used for switch when connected to SW_OUT.


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