参数资料
型号: TPS51217DSCR
厂商: Texas Instruments
文件页数: 5/29页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 10-SON
标准包装: 1
系列: D-CAP™
PWM 型: 控制器
输出数: 1
频率 - 最大: 368kHz
占空比: 89%
电源电压: 4.5 V ~ 6.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 10-WFDFN 裸露焊盘
包装: 标准包装
其它名称: 296-28856-6

DEVICE INFORMATION
DSC PACKAGE
(TOP VIEW)
SLUS947B – JUNE 2009 – REVISED APRIL 2012
PGOOD
TRIP
1
2
10
9
VBST
DRVH
EN
VFB
TRAN
3
4
5
TPS51217DSC
GND
8
7
6
SW
V5IN
DRVL
Thermal pad is used as an active terminal of GND.
PIN FUNCTIONS
NAME
PIN
NO.
I/O
DESCRIPTION
DRVH
DRVL
EN
GND
9
6
3
Thermal
Pad
O
O
I
I
High-side MOSFET driver output. The SW node referenced floating driver. The gate drive voltage is
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
V5IN voltage.
SMPS enable pin. Short to GND to disable the device.
Ground
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- μ s delay.
SW
8
I
Switch node. A high-side MOSFET gate drive return. Also used for on time generation and output
discharge.
Dynamic voltage change control. It forces CCM and masks PGOOD, OVP and UVP when this pin's status
TRAN
5
I
is pulled up or pulled down. The masking is terminated 900 μ s after TRAN pin voltage returns to normal.
See the DYNAMIC VOLTAGE STEP and PGOOD/OVP/UVP MASK section for a detailed description.
Leave this pin open when dynamic voltage change is not used.
OCL detection threshold setting pin. 10 μ A at room temperature, 4700 ppm/°C current is sourced and set
the OCL trip voltage as follows.
TRIP
2
I
V OCL =
V (TRIP)
8
(0.2 V ≤ V (TRIP) ≤ 3 V)
V5IN
VBST
VFB
7
10
4
I
I
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
the SW pin. Internally connected to V5IN via bootstrap MOSFET switch.
SMPS feedback input. Connect the feedback resistor divider.
Copyright ? 2009–2012, Texas Instruments Incorporated
Product Folder Link(s) : TPS51217
5
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