- 您现在的位置：买卖IC网 > PDF目录299867 > REG711EA-5/2K5 (TEXAS INSTRUMENTS INC) 0.005 A SWITCHED CAPACITOR REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | REG711EA-5/2K5 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.005 A SWITCHED CAPACITOR REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, MSOP-8 |
| 文件页数： | 11/13页 |
| 文件大小： | 349K |
| 代理商： | REG711EA-5/2K5 |
REG711
7
SBVS027A
THEORY OF OPERATION
The REG711 regulated charge pump provides a regulated
output voltage for input voltages ranging from less than the
output to greater than the output. This is accomplished by
automatic mode switching within the device. When the input
voltage is greater than the required output, the unit functions
as a variable pulse-width switch-mode regulator. This opera-
tion is shown in Figure 1. Transistors Q1 and Q3 are held off,
Q4 is on, and Q2 is switched as needed to maintain a
regulated output voltage.
A conversion clock of 50% duty cycle is generated. During
the first half cycle the FET switches are configured as shown
in Figure 2A, and CPUMP charges to VIN. During the second
half cycle the FET switches are configured as shown in
Figure 2B, and the voltage on CPUMP is added to VIN. The
output voltage is regulated by skipping clock cycles as
necessary.
PEAK CURRENT REDUCTION
In normal operation, the charging of the pump and output
capacitors usually leads to relatively high peak input cur-
rents which can be much higher than that of the average load
current. The regulator incorporates circuitry to limit the
input peak current, lowering the total EMI production of the
device and lowering output voltage ripple and input current
ripple. Input capacitor (CIN) supplies most of the charge
required by input current peaks.
PROTECTION
The regulator has thermal shutdown circuitry that protects it
from damage caused by overload conditions. The thermal
protection circuitry disables the output when the junction
temperature reaches approximately 160
°C, allowing the de-
vice to cool. When the junction temperature cools to ap-
proximately 140
°C, the output circuitry is automatically re-
enabled. Continuously running the regulator into thermal
shutdown can degrade reliability. The regulator also pro-
vides current limit to protect itself and the load.
SHUTDOWN MODE
A control pin on the regulator can be used to place the device
into an energy-saving shutdown mode. In this mode, the
output is disconnected from the input as long as VIN is
greater than or equal to minimum VIN and the input quies-
cent current is reduced to 2
A maximum.
FIGURE 1. Simplified Schematic of the REG711 Operating
in the Step-Down Mode.
When the input voltage is less than the required output
voltage, the device switched to a step-up or boost mode of
operation, as shown in Figure 2.
FIGURE 2. Simplified Schematic of the REG711 Operating in the Step-Up or Boost Mode.
C
PUMP
C
IN
C
OUT
V
OUT
V
IN
Q
1
Q
3
Q
2
Q
4
OFF
SWITCHED
ON
Step-Down (Buck) Mode
C
PUMP
C
IN
C
OUT
V
OUT
V
IN
Q
1
Q
3
Q
2
Q
4
OFF
ON
OFF
Step-Up (Boost) Mode
+
–
(A)
C
PUMP
C
IN
C
OUT
V
OUT
V
IN
Q
1
Q
3
Q
2
Q
4
ON
OFF
ON
+
–
(B)
相关PDF资料 |
PDF描述 |
|---|---|
| RF06T-T4RP3-T4RP3-0300 | INTERCONNECTION DEVICE |
| RF06T-T4SP3-T4RP3-0100 | INTERCONNECTION DEVICE |
| RF06T-T4SP3-T4SP3-0100 | INTERCONNECTION DEVICE |
| RF081-MH1RP-MH3RP-0100 | INTERCONNECTION DEVICE |
| RF101 | Fast recovery Diodes (Silicon Epitaxial Planar) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| REG711EVM-232 | 功能描述:电源管理IC开发工具 REG711-232 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| REG96PCOV | 功能描述:控制器 TEMP CTRL, 96X48, TERMINAL BLOCK COVER RoHS:否 制造商:Omron Industrial 模拟/数字:Digital 类型:Digital Temperature Controller 显示器类型:11-Segment, 4 Digit 电源电压:100 VAC to 240 VAC 安装: 控制方法: 大小:48 mm x 48 mm |
| REG96PUN1JHU | 功能描述:控制器 TEMP CTRL, 96X48, UNIV, 1 CURRENT, 3 ALRM, MOD RoHS:否 制造商:Omron Industrial 模拟/数字:Digital 类型:Digital Temperature Controller 显示器类型:11-Segment, 4 Digit 电源电压:100 VAC to 240 VAC 安装: 控制方法: 大小:48 mm x 48 mm |
| REG96PUN1JLU | 功能描述:控制器 TEMP CTRL, 96X48, UNIV, 1 CURRENT, 3 ALRM, MOD RoHS:否 制造商:Omron Industrial 模拟/数字:Digital 类型:Digital Temperature Controller 显示器类型:11-Segment, 4 Digit 电源电压:100 VAC to 240 VAC 安装: 控制方法: 大小:48 mm x 48 mm |
| REG96PUN1LHU | 功能描述:控制器 TEMP CTRL, 96X48, UNIV, 1 SSR, 3 ALRM, MODBUS RoHS:否 制造商:Omron Industrial 模拟/数字:Digital 类型:Digital Temperature Controller 显示器类型:11-Segment, 4 Digit 电源电压:100 VAC to 240 VAC 安装: 控制方法: 大小:48 mm x 48 mm |
发布紧急采购，3分钟左右您将得到回复。