參數(shù)資料
型號(hào)： TPS65167ARHARG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 4.9 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, QFN-40
文件頁數(shù)： 7/41頁
文件大小： 1270K
代理商： TPS65167ARHARG4
www.ti.com
200
s/div
m
CTRL
VGH
Temperature Sensor Output TEMP
Thermal Shutdown
Undervoltage Lockout
Short circuit protection (all outputs)
SLVS760C – APRIL 2007 – REVISED MARCH 2008
Figure 22. Power-up Sequencing (REGOUT vs VREF)
This is implemented by connecting a 4.7
F bypass capacitor to REGOUT and a 100 nF bypass capacitor to the
REF pin. If the bypass capacitor on the REF pin is selected larger than 100 nF, then the bypass capacitor on
REGOUT needs to be increased accordingly. Refer to Table 2 to properly select a bypass capacitor.
The REF pin provides a reference output which is used to regulate the negative charge pump. In order to have a
stable reference voltage, a 100 nF bypass capacitor is required, which needs to be connected directly from REF
to GND (pin 37) for best noise immunity. The reference output has a current capability of 30
A which must not
be exceeded. Therefore, the feedback resistor value from FBN to REF must not be smaller than 40 k
.
Table 2. Bypass Capacitor Selection
REGOUT
Type/Rating
REF
Type
Option 1
4.7
F
X7R or X5R/10V
100 nF
x7R or X5R
Option 2
10
F
X7R or X5R/10V
220 nF or 100 nF
x7R or X5R
The device provides a temperature sensor output measuring the actual chip temperature. This pin has an analog
output capable of driving 200
A. The TEMP pin requires a 1 nF output capacitor to provide a stable output
voltage. At 85
°C, the typical output voltage is 2.037 V with a temperature coefficient of 5.9 mV/°C. See Figure 16
for the output characteristic of the temperature output.
A thermal shutdown is implemented to prevent damages due to excessive die temperatures. Once the thermal
shutdown is exceeded, the device enters shutdown. The device can be enabled again by cycling the EN pin or
input voltage to ground.
To avoid mis-operation of the device at low input voltages an undervoltage lockout is included which shuts down
the device at voltages lower than 5.2 V.
All the outputs have a short circuit protection implemented.
Copyright 2007–2008, Texas Instruments Incorporated
15
Product Folder Link(s): TPS65167 TPS65167A
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