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| 型号： | TPS51427ARHBRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 1/42页 |
| 文件大小： | 2131K |
| 代理商： | TPS51427ARHBRG4 |
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1
FEATURES
DESCRIPTION
APPLICATIONS
www.ti.com .................................................................................................................................................. SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008
DUAL D-CAP SYNCHRONOUS STEP-DOWN CONTROLLER
FOR NOTEBOOK POWER RAILS
23
Fixed-Frequency Emulated On-Time Control;
The TPS51427A is a dual synchronous step-down
Frequency Selectable from Three Options
controller
designed
for
notebook
and
mobile
communications applications. This device is part of a
D-CAP Mode Enables Fast Transient
low-cost suite of notebook power bus regulators that
Response Less than 100 ns
enables system designs with low external component
Advanced Ramp Compensation Allows Low
counts.
The
TPS51427A
includes
two
Output Ripple with Minimal Jitter
pulse-width-modulation (PWM) controllers, SMPS1
Selectable PWM-Only/OOA/Auto-Skip Modes
and SMPS2. The output of SMPS1 can be adjusted
from 0.7 V to 5.9 V, while the output of SMPS2 can
Wide Input Voltage Range: 5.5 V to 28 V
be adjusted from 0.5 V to 2.5 V. This device also
Dual Fixed or Adjustable SMPS:
features a low-dropout (LDO) regulator that provides
–
0.7 V to 5.9 V (Channel1)
a 5-V/3.3-V output, or adjustable from 0.7-V to 4.5-V
output via LDOREFIN. The fixed-frequency emulated
–
0.5 V to 2.5 V (Channel2)
adaptive on-time control supports seamless operation
Fixed 3.3-V/5-V, or Adjustable Output 0.7-V to
between PWM mode under heavy load conditions
4.5-V LDO; Capable of Sourcing 100 mA
and reduced frequency operation at light loads for
Fixed 3.3-VREF Output Capable of Sourcing
high-efficiency down to the milliampere range. An
10 mA
integrated boost switch enhances the high-side
MOSFET to further improve efficiency. The main
Temperature Compensated Low-Side R
DS(on)
control loop is the D-CAP mode that is optimized
Current Sensing
for low equivalent series resistance (ESR) output
Adaptive Gate Drivers with Integrated Boost
capacitors such as POSCAP or SP-CAP. Advanced
Switch
ramp compensation minimizes jitter without degrading
line and load regulation. RDS(on) current sensing
Bootstrap Charge Auto Refresh
methods offers maximum cost saving.
Integrated Soft Start, Tracking Soft Stop
The TPS51427A supports supply input voltages that
Independent PGOOD and EN for Each Channel
range from 5.5 V to 28 V. It is available in the 32-pin,
OOB Function Disabled. Refer to TPS51427 for
5-mm
×
5-mm
QFN
package
(Green,
RoHs-
OOB-Enabled Device
compliant, and Pb-free). The device is specified from
–40°C to +85°C.
Notebook I/O and System Bus Rails
Graphics Application
PDAs and Mobile Communication Devices
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
D-CAP, OOA are trademarks of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS51427ARHBT | 功能描述:DC/DC 开关控制器 Dual D-Cap Sync Step Down Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51427ARHBTG4 | 功能描述:DC/DC 开关控制器 Dual D-Cap Synch Step Down Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51427RHBR | 功能描述:DC/DC 开关控制器 Dual D-Cap Synch Step Down Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51427RHBRG4 | 功能描述:DC/DC 开关控制器 Dual D-Cap Sync Step Down Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS51427RHBT | 功能描述:DC/DC 开关控制器 Dual D-Cap Synch Step Down Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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