參數(shù)資料
型號(hào)： TPS51211DSCT
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 314 kHz SWITCHING FREQ-MAX, PDSO10
封裝： PLASTIC, SON-10
文件頁(yè)數(shù)： 23/26頁(yè)
文件大?。?/td> 674K
代理商： TPS51211DSCT
1
2
3
4
5
10
9
8
7
6
PGOOD
TRIP
EN
VFB
TST
VBST
DRVH
SW
V5IN
DRVL
TPS51211DSC
GND
DSC PACKAGE
(TOP VIEW)
TRIP
OCL
V
8
=
TPS51211
SLUSAA7 – NOVEMBER 2010
www.ti.com
DEVICE INFORMATION
Thermal pad is used as an active terminal of GND.
PIN FUNCTIONS
PIN
I/O
DESCRIPTION
NAME
NO.
High-side MOSFET driver output. The SW node referenced floating driver. The gate drive voltage is
DRVH
9
O
defined by the voltage across VBST to SW node bootstrap flying capacitor
Synchronous MOSFET driver output. The GND referenced driver. The gate drive voltage is defined by
DRVL
6
O
V5IN voltage.
EN
3
I
SMPS enable pin. Short to GND to disable the device.
Thermal
GND
I
Ground
Pad
Power Good window comparator open drain output. Pull up with resistor to 5 V or appropriate signal
PGOOD
1
O
voltage. Continuous current capability is 1 mA. PGOOD goes high 1 ms after VFB becomes within
specified limits. Power bad, or the terminal goes low, after a 2- ms delay.
Switch node. A high-side MOSFET gate drive return. Also used for on time generation and output
SW
8
I
discharge.
OCL detection threshold setting pin. 10 mA at room temperature, 4700 ppm/°C current is sourced and set
the OCL trip voltage as follows.
TRIP
2
I
(0.2 V
≤ VTRIP ≤ 3 V)
TST
5
I
Used for testing purpose in production line. Pull down to GND with a resistor of 470 k
Ω or less.
V5IN
7
I
5-V +30%/–10% power supply input.
Supply input for high-side MOSFET driver (bootstrap terminal). Connect a flying capacitor from this pin to
VBST
10
I
the SW pin. Internally connected to V5IN via bootstrap MOSFET switch.
VFB
4
I
SMPS feedback input. Connect the feedback resistor divider.
6
Copyright 2010, Texas Instruments Incorporated
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