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参数资料
| 型号： | TPS2220BDBG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
| 封装： | GREEN, PLASTIC, SSOP-24 |
| 文件页数： | 16/31页 |
| 文件大小： | 774K |
| 代理商： | TPS2220BDBG4 |
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12-V FLASH MEMORY SUPPLY
NOTE A: The enable terminal can be tied to a general-purpose I/O terminal on the PCMCIA controller or tied high.
TPS2220B
AVPP
AVCC
LATCH
CLOCK
DATA
OC
RESET
3.3 V
5 V
3.3 V
5 V
12 V
5 V
SHDN
0.1
F
0.1
F
1
F
0.1
F
4.7
F
EN
REF
SS
COMP
TPS6734
VCC
FB
OUT
GND
1
2
3
4
L1
18
H
8
7
6
5
R1
10 k
Enable
(see Note A)
C1
33
F
20 V
C2
0.01
F
12 V
D1
33
F, 20 V
C4
0.001
F
3.3 V or 5 V
+
C1
+
TPS2220B
SLVS554 – JANUARY 2005
The TPS6734 is a fixed 12-V output boost converter capable of delivering 120 mA from inputs as low as 2.7 V.
The device is pin-for-pin compatible with the MAX734 regulator and offers the following advantages: lower supply
current, wider operating input-voltage range, and higher output currents. As shown in Figure 36, the only external
components required are: an inductor, a Schottky rectifier, an output filter capacitor, an input filter capacitor, and
a small capacitor for loop compensation. The entire converter occupies less than 0.7 in2 of PCB space when
implemented with surface-mount components. An enable input is provided to shut the converter down and
reduce the supply current to 3 A when 12 V is not needed.
The TPS6734 is a 170-kHz current-mode PWM (pulse-width modulation) controller with an n-channel MOSFET
power switch. Gate drive for the switch is derived from the 12-V output after start-up to minimize the die area
needed to realize the 0.7-
MOSFET and improve efficiency at input voltages below 5 V. Soft start is
accomplished with the addition of one small capacitor. A 1.22-V reference, pin 2 of TPS6734, is brought out for
external use. For additional information, see the TPS6734 data sheet (SLVS127).
Figure 36. TPS2220B With TPS6734 12-V, 120-mA Supply
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2220BDBR | 功能描述:热插拔功率分布 Single PC Card Ser Intfc Pwr Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2220BDBRG4 | 功能描述:热插拔功率分布 Single PC Card Ser Intfc Pwr Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2220BPWP | 功能描述:热插拔功率分布 Single PC Card Ser Intfc Pwr Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2220BPWPG4 | 功能描述:热插拔功率分布 Single PC Card Ser Intfc Pwr Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2220BPWPR | 功能描述:热插拔功率分布 Single PC Card Ser Intfc Pwr Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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