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参数资料
| 型号： | TPS54226RGTT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PQCC16 |
| 封装： | GREEN, PLASTIC, QFN-16 |
| 文件页数： | 24/27页 |
| 文件大小： | 923K |
| 代理商： | TPS54226RGTT |
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SW
VBST
EN
VO
VFB
GND
PGND
VO
4
6
9
10
11
1
2
7
12
VIN
SS
VIN
VREG5
EN
Logic
UV
OV
Protection
Logic
Ref
SS
UV
OV
UVLO
Softstart
SS
REF
TSD
Ref
VREG5
5
PG
1mF
13
8
VCC
Ceramic
Capacitor
3
SGND
PGND
VCC
+20%
-10%
Ref
VREG5
Control logic
1 shot
XCON
-30%
OCP
SW
PGND
ZC
SW
PGND
14
VREG5
SLVSA14D
– OCTOBER 2009 – REVISED FEBRUARY 2011
FUNCTIONAL BLOCK DIAGRAM
A.
Block diagram shown is for PWP 14 pin package. QFN 16 pin package block diagram is identical except for pin out.
OVERVIEW
The TPS54226 is a 2-A synchronous step-down (buck) converter with two integrated N-channel MOSFETs and
Auto-Skip Eco-Mode
to improve light lode efficiency. It operates using D-CAP2 mode control. The fast
transient response of D-CAP2
control reduces the output capacitance required to meet a specific level of
performance. Proprietary internal circuitry allows the use of low ESR output capacitors including ceramic and
special polymer types.
DETAILED DESCRIPTION
PWM Operation
The main control loop of the TPS54226 is an adaptive on-time pulse width modulation (PWM) controller that
supports a proprietary D-CAP2
mode control. D-CAP2 mode control combines constant on-time control with
an internal compensation circuit for pseudo-fixed frequency and low external component count configuration with
both low ESR and ceramic output capacitors. It is stable even with virtually no ripple at the output.
At the beginning of each cycle, the high-side MOSFET is turned on. This MOSFET is turned off after internal one
6
2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS54226
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54227 | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5V to 18V Input, 2-A SYNCHRONOUS STEP DOWN SWIFT |
| TPS54227DDA | 功能描述:直流/直流开关调节器 4.5-18Vin,2A Sync Step Down Cnvrtr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54227DDAR | 功能描述:直流/直流开关调节器 4.5-18Vin,2A Sync Step Down Cnvrtr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54227DRCR | 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 2A 10SON 制造商:Texas Instruments 功能描述:2A Single Sync DC/DC converter |
| TPS54227DRCT | 制造商:Texas Instruments 功能描述:2A SINGLE SYNC DC/DC CONVERTER - Tape and Reel 制造商:Texas Instruments 功能描述:2A SINGLE SYNC DC/DC CONVERTER - Cut TR (SOS) 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 2A 10SON 制造商:Texas Instruments 功能描述:IC SYNC STEP DOWN 700KHZ SO 制造商:Texas Instruments 功能描述:IC, SYNC STEP DOWN, 700KHZ, SON-10 制造商:Texas Instruments 功能描述:Voltage Regulators - Switching Regulators 4.5-18Vin,2A Sync SD Cnvrtr 制造商:Texas Instruments 功能描述:IC, SYNC STEP DOWN, 700KHZ, SON-10, Primary Input Voltage:18V, No. of Outputs:1, 制造商:Texas Instruments 功能描述:2A Single Sync DC/DC converter |
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