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參數(shù)資料
| 型號： | TPS60141PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.1 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數(shù)： | 18/23頁 |
| 文件大?。?/td> | 862K |
| 代理商： | TPS60141PWPR |
TPS60140, TPS60141
LOW POWER DCDC CONVERTER
REGULATED 5 V, 100mA CHARGE PUMP VOLTAGE TRIPLER
SLVS273 FEBRUARY 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
C1+
6
Positive terminal of the flying capacitor C1
C1
8
Negative terminal of the flying capacitor C1
C2+
15
Positive terminal of the flying capacitor C2
C2
13
Negative terminal of the flying capacitor C2
ENABLE
3
I
ENABLE input. Connect ENABLE to IN for normal operation. When ENABLE is a logic low, the device turns off and
the supply current decreases to 0.05
A. The output is disconnected from the input when the device is placed in
shutdown.
FB
4
I
Feedback input. Connect FB to OUT as close to the load as possible to achieve best regulation. A resistive divider
is on the chip to match the output voltage to the internal reference voltage of 1.21 V.
GND
1, 2,
19, 20
Ground. Analog ground for internal reference and control circuitry. Connect to PGND through a short trace.
IN
7,14
I
Supply input. Bypass IN to PGND with capacitor Ci. Connect both IN terminals through a short trace.
LBO/PG
17
O
Low battery detector output (TPS60140) or power good output (TPS60141). Open drain output of the low-battery
indicator or power-good comparator. It can sink 1 mA. A 100-k
to 1-M pullup is recommended. Leave the terminal
unconnected if the low-battery or power-good detector function is not used.
LBI/NC
18
I
Low battery detector input (TPS60140 only). The voltage applied to this terminal is compared to the internal 1.21-V
reference voltage. Connect the terminal to ground if the low-battery comparator is not used. On the TPS60141, this
terminal is not connected to the chip and should remain unconnected.
NC
16
Not connected
OUT
5
O
Regulated 5-V power output. Bypass OUT to PGND with the output filter capacitor Co.
PGND
912
Power ground. The charge-pump current flows through this terminal. Connect all PGND terminals together.
detailed description
The TPS6014x charge pumps provide a regulated 5-V output from a 1.8-V to 3.6-V input voltage range. They
can deliver a maximum continuous load current of at least 100 mA at VI = 2 V minimum. Designed specifically
for space-critical battery-powered applications, the complete charge pump circuit requires only four external
capacitors.
The TPS6014x consist of an oscillator, a 1.21-V voltage reference, an internal resistive feedback circuit, an error
amplifier, high current MOSFET switches, a shutdown/start-up circuit, a low-battery or power-good comparator
and a control circuit (see the functional block diagrams).
operating principle
The TPS6014x devices regulate the output voltage using an improved pulse-skip topology. In pulse-skip mode
the error amplifier disables switching of the power stages when it detects an output voltage higher than 5 V.
The oscillator halts and the controller skips switching cycles. The error amplifier reactivates the oscillator and
starts switching of the power stages again when the output voltage drops below 5 V. The output resistance of
the charge pump is controlled to improve the ripple performance. This limits the output current to the minimum
that is necessary to sustain a regulated output voltage. The benefit is that the ripple performance is nearly as
good as with a linear-regulation topology.
At light loads a conventional pulse-skip regulation mode is used, but the charge pump output resistance is held
at a high level. The pulse-skip regulation minimizes the operating current because the charge pump does not
switch continuously and hence the gate-charge losses of the MOSFETs are reduced. Additionally, all functions
except voltage reference, error amplifier, and low-battery or power-good comparator are deactivated when the
output is higher than 5 V. When switching is disabled by the error amplifier, the load is also isolated from the
input. This improved pulse-skip control topology is also referred to as active-cycle control.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS60141PWPRG4 | 功能描述:電荷泵 Reg 5-V Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TPS60150 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TPS60150 5V/140mA Charge Pump Device |
| TPS60150_09 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TPS60150 5V/140mA Charge Pump Device |
| TPS60150DRV | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TPS60150 5V/140mA Charge Pump Device |
| TPS60150DRVR | 功能描述:電荷泵 150mA,5V Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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