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参数资料
| 型号： | TPS60121PWPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 27/30页 |
| 文件大小： | 878K |
| 代理商： | TPS60121PWPRG4 |
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TPS60120, TPS60121, TPS60122, TPS60123, TPS60124, TPS60125
REGULATED 200-mA HIGH EFFICIENCY CHARGE PUMP
DC/DC CONVERTERS
SLVS257B – NOVEMBER 1999 – REVISED AUGUST 2000
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
low-battery detector (TPS60120, TPS60122, TPS60124)
The internal low-battery comparator trips at 1.21 V
±5% when the voltage on LBI ramps down. The battery
voltage at which the comparator initiates a low battery warning at the LBO output can easily be programmed
with a resistive divider as shown in Figure 1. The sum of resistors R1 and R2 is recommended to be in the 100-k
to 1-M
range.
LBO is an open drain output. An external pullup resistor to OUT, in the 100-k
to 1-M range, is recommended.
During start-up, the LBO output signal is invalid for the first 500
s. LBO is high impedance when the device
is disabled.
If the low-battery comparator function is not used, connect LBI to ground and leave LBO unconnected.
V
(TRIP) + 1.21 V
1
) R1
R2
_
+
–
VREF
VBAT
IN
R1
LBI
R2
LBO
R3
VO
Figure 1. Programming of the Low-Battery Comparator Trip Voltage
Formulas to calculate the resistive divider for low battery detection, with VLBI = 1.15 V – 1.27 V:
R2
+ 1MW
V
LBI
V
Bat
R1
+ 1MW * R2
Formulas to calculate the minimum and maximum battery voltage that triggers the low battery detector:
V
Bat(min) +
V
LBI(min)
R1
(min) )
R2
(max)
R2
(max)
V
Bat(max) +
V
LBI(max)
R1
(max) )
R2
(min)
R2
(min)
Table 1. Recommended Values for the Resistive Divider From the E96 Series (
±1%),
VLBI = 1.15 V – 1.27 V
VBAT/V
R1/k
R2/k
VBAT (MIN)/V
VBAT(MAX)/V
1.8
357
732
1.700
–5.66%
1.902
5.67%
1.9
365
634
1.799
–5.32%
2.016
6.11%
2.0
412
634
1.883
–5.86%
2.112
5.6%
2.1
432
590
1.975
–5.95%
2.219
5.67%
2.2
442
536
2.080
–5.45%
2.338
6.27%
Using
±1% accurate resistors, the total accuracy of the trip voltage is about ±6%, considering the ±4% accuracy
the integrated voltage reference adds and considering that not every calculated resistor value is available.
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| TPS60122PWPR | 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20 |
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| TPS60122PWP | 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS60122 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REGULATED 3.3 V, 200-mA HIGH EFFICIENCY CHARGE PUMP DC/DC CONVERTERS |
| TPS60122PWP | 功能描述:电荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter 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 |
| TPS60122PWPG4 | 功能描述:电荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter 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 |
| TPS60122PWPR | 功能描述:电荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter 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 |
| TPS60122PWPRG4 | 功能描述:电荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter 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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