TPS7B6333-Q1_17 Datasheet, PDF (3/33 Pages) Texas Instruments – 300-mA 40-V High-Voltage, Ultralow-Quiescent-Current Watchdog LDO

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5 Pin Configuration and Functions
TPS7B6333-Q1, TPS7B6350-Q1
SLVSDU9A – FEBRUARY 2017 – REVISED MARCH 2017
PWP PowerPAD™ Package
16-Pin HTSSOP With Exposed Thermal Pad
Top View
IN
1
EN
2
FSEL
3
WTS
4
GND
5
NC
6
ROSC
7
DELAY
8
16
15
14
13
Thermal pad
12
11
10
9
OUT
PGADJ
PG
GND
WRS
WD_EN
WDO
WD
NC - No internal connection
PIN
I/O
NAME
NO.
DELAY
8
O
EN
2
I
FSEL
GND
IN
NC
OUT
PG
3
I
5, 13
—
1
I
6
—
16
O
14
O
PGADJ
15
O
ROSC
7
O
WD
WDO
9
I
10
O
WD_EN
11
I
WRS
12
I
WTS
4
O
Thermal pad
—
—
Not to scale
Pin Functions
DESCRIPTION
Power-good delay-period adjustment pin. Connect this pin via a capacitor to ground to adjust
the power-good delay time.
Device enable pin. Pull this pin down to low-level voltage to disable the device. Pull this pin
up to high-level voltage to enable the device.
Internal oscillator-frequency selection pin. Pull this pin down to low-level voltage to select the
high-frequency oscillator. Pull this pin up to high-level voltage to select the low-frequency
oscillator.
Ground reference
Device input power supply pin
Not connected
Device 3.3-V or 5-V regulated output-voltage pin
Power-good pin. Open-drain output pin. Pull this pin up to V_OUT or to a reference through a
resistor. When the output voltage is not ready, this pin is pulled down to ground.
Power-good threshold-adjustment pin. Connect a resistor divider between the PGADJ and
OUT pins to set the power-good threshold. Connect this pin to ground to set the threshold to
91.6% of output voltage V_OUT.
Watchdog timer adjustment pin. Connect a resistor between the ROSC pin and the GND pin
to set the duration of the watchdog monitor. Leaving this pin open or connecting this pin to
ground results in the watchdog reporting a fault at the watchdog output (WDO).
Watchdog service-signal input pin.
Watchdog status pin. Open-drain output pin. Pull this pin up to OUT or a reference voltage
through a resistor. When watchdog fault occurs, this pin is pulled down to a low-level voltage.
Watchdog enable pin. Pull this pin down to a low level to enable the watchdog. Pull this pin
up to a high level to disable the watchdog.
Window ratio-selection pin (only applicable for the window watchdog). Pull this pin down to a
low level to set the open:closed window ratio to 1:1. Pull this pin up to high level to set the
open:closed window ratio to 8:1.
Watchdog type-selection pin. To set the window watchdog, connect this pin to the GND pin.
To set the standard watchdog, pull this pin high.
Solder to board to improve the thermal performance.
Copyright © 2017, Texas Instruments Incorporated
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Product Folder Links: TPS7B6333-Q1 TPS7B6350-Q1