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| 型号： | TPS60110PWPRG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SWITCHED CAP 20HTSSOP |
| 标准包装： | 2,000 |
| 类型： | 升压（升压），切换电容（充电泵） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 2.7 V ~ 5.4 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 300mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-HTSSOP |
| 配用： | 296-10946-ND - EVAL MOD FOR TPS60110 |
TPS60110
REGULATED 5 V 300 mA LOW NOISE
CHARGE PUMP DC/DC CONVERTER
SLVS215C ? JUNE 1999 ? REVISED AUGUST 2008
detailed description (continued)
start-up procedure
During start-up, i.e. when ENABLE is set from logic low to logic high, the switches T12 and T14 (charge pump
1), and the switches T22 and T24 (charge pump 2) are conducting to charge up the output capacitor until the
output voltage V O reaches 0.8 × V IN . When the start-up comparator detects this limit, the IC begins to operate
in the mode selected with SKIP and COM. This start-up charging of the output capacitor specifies a short start-up
time and eliminates the need for a Schottky diode between IN and OUT.
pulse-skip mode
In pulse-skip mode (SKIP = high), the error amplifier disables switching of the power stages when it detects an
output higher than 5 V. The oscillator halts. The IC then skips switching cycles until the output voltage drops
below 5 V. Then the error amplifier reactivates the oscillator and switching of the power stages starts again. The
pulse-skip regulation mode minimizes operating current because it does not switch continuously and
deactivates all functions except bandgap reference and error amplifier when the output is higher than 5 V. When
switching is disabled from the error amplifier, the load is also isolated from the input. SKIP is a logic input and
should not remain floating. The typical operating circuit of the TPS60110 in pulse skip mode is shown in
Figure 1.
constant-frequency mode
When SKIP is low, the charge pump runs continuously at the frequency f OSC . The control circuit, fed from the
error amplifier, controls the charge on C 1F and C 2F by driving the gates of the FETs T 12 /T 13 and T 22 /T 23 ,
respectively. When the output voltage falls, the gate drive increases, resulting in a larger voltage across C 1F
and C 2F . This regulation scheme minimizes output ripple. Since the device switches continuously, the output
noise contains well-defined frequency components, and the circuit requires smaller external capacitors for a
given output ripple. However, constant-frequency mode, due to higher operating current, is less efficient at light
loads than pulse-skip mode.
INPUT
2.7 V to 5.4 V
CIN
15 μ F
+
C1F
2.2 μ F
SKIP COM CLK
IN OUT
IN OUT
TPS60110 FB
C1+ C2+
C1? C2?
C2F
2.2 μ F
+
OUTPUT
5 V 300 mA
CO = 33 μ F
ENABLE
SYNC
OFF/ON
PGND GND
Figure 24. Typical Operating Circuit TPS60110 in Constant Frequency Mode
Table 1. Tradeoffs Between Operating Modes
FEATURE
PULSE-SKIP MODE
(SKIP = High)
CONSTANT-FREQUENCY MODE
(SKIP = Low)
Best light-load efficiency
Smallest external component size for a given output ripple
X
X
Output ripple amplitude
Output ripple frequency
Load regulation
Small amplitude
Variable
Very good
Very small amplitude
Constant
Good
NOTE: Even in pulse-skip mode the output ripple amplitude is small if the push-pull operating mode is selected via COM.
POST OFFICE BOX 655303
? DALLAS, TEXAS 75265
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS60111 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REGULATED 5-V 150-mA LOW-NOISE CHARGE PUMP DC/DC CONVERTER |
| TPS60111PWP | 功能描述:电荷泵 Reg 5V Lo-Ns Charge Pump DC-DC Cnvtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60111PWPG4 | 功能描述:电荷泵 Reg 5V Lo-Ns Charge Pump DC-DC Cnvtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60111PWPR | 功能描述:电荷泵 Reg 5V Lo-Ns Charge Pump DC-DC Cnvtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60111PWPRG4 | 功能描述:电荷泵 Reg 5V Lo-Ns Charge Pump DC-DC Cnvtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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