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TPS62740DSSR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
DC/DC转换器
封装:
WSON-12
描述:
TEXAS INSTRUMENTS TPS62740DSSR 直流-直流开关降压, 逐步递降稳压器, 可调, 2.2V-5.5V输入, 1.8V-3.3V/0.3A输出, 2MHz, WSON-12 新
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引脚图在P3Hot
典型应用电路图在P1P12
原理图在P8
封装尺寸在P25P27P28
标记信息在P3P25
封装信息在P24P25P26P27P28
技术参数、封装参数在P4
应用领域在P1P32
电气规格在P5P6P12
导航目录
TPS62740DSSR数据手册
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SW
PG
VIN
GND
VOUT
EN
1
2
3
DSS PACKAGE
(TOP VIEW)
12
11
10
VSEL1
4
9
LOAD
CTRL
8
7
5
6
VSEL2
VSEL3
VSEL4
EXPOSED
THERMAL PAD
TPS62740, TPS62742
www.ti.com
SLVSB02B –NOVEMBER 2013–REVISED JULY 2014
6 Device Comparison Table
PACKAGE
OUTPUT CURRENT
T
A
PART NUMBER OUTPUT VOLTAGE SETTING VSEL 1 - 4
[mA]
MARKING
TPS62740 1.8V to 3.3V in 100mV steps 300mA 62740
–40°C to 85°C TPS62741
(1)
1.3V to 2.8V in 100mV steps 300mA -/-
TPS62742 1.8V to 3.3V in 100mV steps 400mA 62742
(1) Device option, contact TI for more details
7 Pin Configuration and Functions
WSON PACKAGE
12-Pin
Pin Functions
PIN
I/O DESCRIPTION
NAME NO
VIN 1 PWR V
IN
power supply pin. Connect this pin close to the VIN terminal of the input capacitor. A ceramic capacitor
of 4.7µF is required.
SW 2 OUT This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this
terminal.
GND 3 PWR GND supply pin. Connect this pin close to the GND terminal of the input and output capacitor.
CTRL 4 IN This pin controls the output LOAD pin. With CTRL = low, the output LOAD is disabled. This pin must be
terminated.
VOUT 5 IN Feedback pin for the internal feedback divider network and regulation loop. An internal load switch is
connected between this pin and the LOAD pin. Connect this pin directly to the output capacitor with a short
trace.
LOAD 6 OUT This output is controlled by the CTRL Pin. With CTRL high, an internal load switch connects the LOAD pin
to the VOUT pin. The LOAD pin allows to connect / disconnect other system components to the output of
the DC/DC converter. This pin is pulled to GND with CTRL pin = low. The LOAD pin features a soft
switching. If not used, leave the pin open.
PG 7 OUT Power good open drain output. This pin is high impedance to indicate "Power Good". Connect a external
pull up resistor to generate a "high" level. If not used, this pin can be left open.
VSEL4 8 IN Output voltage selection pins. See Table 1 for V
OUT
selection. These pins must be terminated and can be
changed during operation.
VSEL3 9 IN
VSEL2 10 IN
VSEL1 11 IN
EN 12 IN High level enables the devices, low level turns the device into shutdown mode. This pin must be
terminated.
EXPOSED NC Not electrically connected to the IC, but must be soldered. Connect this pad to GND and use it as a central
THERMAL PAD GND plane.
Copyright © 2013–2014, Texas Instruments Incorporated Submit Documentation Feedback 3
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