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参数资料
| 型号： | TPS60502DGSRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.3 A SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3.05 X 4.98 MM, PLASTIC, MSOP-10 |
| 文件页数： | 24/24页 |
| 文件大小： | 743K |
| 代理商： | TPS60502DGSRG4 |
TPS60500, TPS60501
TPS60502, TPS60503
SLVS391B OCTOBER 2001 REVISED FEBRUARY 2002
9
www.ti.com
PRINCIPLES OF OPERATION
The TPS6050x charge pumps provide a regulated output voltage in the range of 0.8 V to 3.3 V from an input
voltage of 1.8 V to 6.5 V. The devices use switched capacitor fractional conversion to achieve high efficiency
over the entire input and output voltage range. Regulation is achieved by sensing the output voltage and
enabling the internal switches as needed to maintain the selected output voltage. This skip-mode regulation is
used over a load range from 0 mA to 150 mA. At a higher output current, the device works in a linear regulation
mode.
The TPS6050x circuits consist of an oscillator, a voltage reference, an internal resistive feedback circuit (fixed
voltage version only), an error amplifier, two charge pump stages with MOSFET switches, a shutdown/start-up
circuit, and a control circuit.
short-circuit current limit and thermal protection
When the output voltage is lower than 0.6 V, the output current is limited to 300 mA typically. The device also
has a thermal protection which reduces the output current when the temperature of the chip exceeds 150
°C.
The output current declines to 0 mA when the chip temperature rises to 160
°C.
enable
Driving EN high disables the converter. This disables all internal circuits, reducing input current to only 0.05
A.
Leakage current drawn from the output pin OUT is a maximum of 1
A. The device exits shutdown once EN
is set low (see start up procedure described below). The typical no-load start-up time is 80
s. When the device
is disabled, the load is isolated from the input, an important feature in battery-operated products because it
extends the battery shelf life.
start-up procedure
The device is enabled when EN is set from logic high to logic low. The charge pump stages immediately start
switching to transfer energy to the output. In start-up until the output voltage has reached 0.6 V, the input current
is limited to 300 mA typically.
power good detector
The power good (PG) output is an open-drain output on all TPS6050x devices. The PG output pulls low when
the output is out of regulation. When the output rises to within 97% of regulation, the power good output goes
high. In shutdown, power good is pulled low. In normal operation, an external pullup resistor is typically used
to connect the PG pin to VO or VI. If the PG output is not used, it should remain unconnected.
td,f
VO
V(NOM)
VIT
PG
1
0
1
0
EN
t
td,r
Figure 21. Power Good Timing Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| TPS60500DGSR | 0.3 A SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS60500DGS | 0.3 A SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS60500DGSRG4 | 0.25 A SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS60500DGSG4 | 0.3 A SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS60503DGSG4 | SWITCHED CAPACITOR REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS60503 | 制造商:TI 制造商全称:Texas Instruments 功能描述:HIGH EFFICIENCY, 250-mA STEP-DOWN CHARGE PUMP |
| TPS60503DGS | 功能描述:电荷泵 250-mA 1.5V Hi-Eff Step-Dwn Chrg Pump 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 |
| TPS60503DGS | 制造商:Texas Instruments 功能描述:IC CHARGE PUMP 1.5V SMD MSOP10 |
| TPS60503DGSG4 | 功能描述:电荷泵 250-mA 1.5V Hi-Eff Step-Dwn Chrg Pump 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 |
| TPS60503DGSR | 功能描述:电荷泵 250-mA 1.5V Hi-Eff Step-Dwn Chrg Pump 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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