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TPS5140PAGR Datasheet(PDF) 8 Page - Texas Instruments

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Part # TPS5140PAGR
Description  FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS5140PAGR Datasheet(HTML) 8 Page - Texas Instruments

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TPS5140
FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER
SLVS305A – DECEMBER 2000 – REVISED JANUARY 2001
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions(Continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
REG5V_IN
42
I
External 5 V input
SCP
17
I/O
Short circuit protection terminal. An external capacitor is connected between SCP and GND to
set the SCP enable time up.
SOFTSTART1
2
I/O
External capacitor from SOFTSTART1 to GND for CH1 soft starts control.
SOFTSTART2
6
I/O
External capacitor from SOFTSTART2 to GND for CH2 soft starts control.
SOFTSTART3
24
I/O
External capacitor from SOFTSTART3 to GND for CH3 soft starts control.
SOFTSTART_12V
22
I/O
External capacitor from SOFTSTART_12V to GND for CH4 (12-V boost converter) soft starts
control.
STBY1
13
I
Stand by control for CH1
STBY2
14
I
Stand by control for CH2
STBY3
16
I
Stand by control for CH3
STBY12V
15
I
Stand by control for 12-V boost converter
STBY_VREF3.3
11
I
Stand by control for 3.3-V linear regulator
STBY_VREF5
12
I
Stand by control for 5-V linear regulator
TRIP1
55
I
External resistor connection for CH1 output current protection control
TRIP2
53
I
External resistor connection for CH2 output current protection control
TRIP3
34
I
External resistor connection for CH3 output current protection control
VCC
46
Supply voltage input
VCC_SENSE12
54
I
Supply voltage input and input voltage terminal for CH1/2 output current sense
VCC_SENSE3
35
I
Supply voltage input and input voltage terminal for CH3 output current sense
VREF3.3
44
O
3.3-V linear regulator output
VREF5
43
O
5-V linear regulator output
detailed description
REF (1.185 V)
The reference voltage is used for setting the output voltage and voltage protection. This reference voltage is
dropped down from the 5-V regulator. The tolerance is 1.5 % over the entire temperature range.
CH1, 2, 3 (synchronous buck controller)
The TPS5140 includes three synchronous buck controllers. CH2 and CH3 (5 V and 2.5 V) are operated in phase,
but CH1 (3.3 V) is operated 180
° out of phase from CH2 and CH3, but at the same frequency. All channels have
separate standby and softstart control.
12-V boost converter
OUT_12V is a 12-V boost converter output . It can isolate VI (5 V) and VO fully.
5-V regulator
An internal linear voltage regulator is used for the high-side driver bootstrap voltage and as the source of Vref.
When the 5-V regulator is disconnected from the MOSFET drivers, it is used only for the source of Vref. Since
the input voltage is from 4.5 V to 28 V, this feature offers a fixed bootstrap voltage to simplify the drive design.
The 5-V regulator is also used for powering the low side driver. The 5-V regulator is active if STBY_VREF5 is
high and has a tolerance of 4%.


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