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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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UVLO
EN
Gate Driver
Anti
Shoot-Through
Current
Limit Comparator
SW
Limit
High Side
VIN
GND
PMOS
NMOS
PG
PG Comp
V
TH_UVLO
VIN
UVLO
Comp
Softstart
Control
Logic
VOUT
V
FB
Main
Comparator
Direct Control
& Compensation
Error
amplifier
Min. On
Min. OFF
VIN
VOUT
Timer
DCS
Control
Current
Limit Comparator
Limit
Low Side
Power Stage
UVLO
Slew Rate
Control
VOUT
Discharge
Load Switch
EN
UVLO
CTRL
LOAD
Internal
feedback
divider
network*
VSEL 1
VSEL 2
VSEL 3
VSEL 4
Ultra Low Power
Reference V = 1.2V
REF
V
TH_100
VIN
Auto 100% Mode
Comp
100%
Mode
V
TH_PG
V
Discharge
OUT
V
FB
UVLO
EN
EN
CTRL
VOUT
* typical 50MW
V
REF
V
FB
TPS62740, TPS62742
SLVSB02B –NOVEMBER 2013–REVISED JULY 2014
www.ti.com
9 Detailed Description
9.1 Overview
The TPS6274x is the first step down converter with an ultra low quiescent current consumption (360nA typ.) and
featuring TI's DCS-Control™ topology while maintaining a regulated output voltage. The device extends high
efficiency operation to output currents down to a few micro amperes.
9.2 Functional Block Diagram
9.3 Feature Description
9.3.1 DCS-Control™
TI's DCS-Control™ (Direct Control with Seamless Transition into Power Save Mode) is an advanced regulation
topology, which combines the advantages of hysteretic and voltage mode control. Characteristics of DCS-
Control™ are excellent AC load regulation and transient response, low output ripple voltage and a seamless
transition between PFM and PWM mode operation. DCS-Control™ includes an AC loop which senses the output
voltage (VOUT pin) and directly feeds the information to a fast comparator stage. This comparator sets the
switching frequency, which is constant for steady state operating conditions, and provides immediate response to
dynamic load changes. In order to achieve accurate DC load regulation, a voltage feedback loop is used. The
internally compensated regulation network achieves fast and stable operation with small external components
and low ESR capacitors.
8 Submit Documentation Feedback Copyright © 2013–2014, Texas Instruments Incorporated
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