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參數(shù)資料
| 型號： | MAX8860EUA28 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Low-Dropout, 300mA Linear Regulator in レMAX |
| 中文描述： | 2.82 V FIXED POSITIVE LDO REGULATOR, 0.22 V DROPOUT, PDSO8 |
| 封裝： | MINIATURE, MICRO MAX PACKAGE-8 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 137K |
| 代理商： | MAX8860EUA28 |
M
Low-Dropout, 300mA
Linear Regulator in μMAX
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
IN
= V
OUT
+ 0.5V, C
IN
= C
OUT
= 2.2μF, C
CC
= 33nF, T
A
= +25°C, unless otherwise noted.)
NAME
FUNCTION
1, 4
2
3
OUT
IN
GND
Regulator Output. Bypass with 2.2μF, low-ESR capacitor to GND for stable operation.
Supply Input. Connect to power source (+2.5V to +6.5V). Bypass with 2.2μF capacitor to GND.
Ground
PIN
Pin Description
4V
2V
0
4V
3V
2V
1V
0
POWER-UP RESPONSE
M
5ms/div
FAULT
V
OUT
V
IN
4V
2V
0
4V
3V
2V
1V
0
POWER-DOWN RESPONSE
M
2ms/div
V
OUT
V
IN
FAULT
4V
2V
0
3V
2V
1V
0
SHUTDOWN/POWER-UP
M
400
μ
s/div
V
OUT
SHDN
5
SET
Output Voltage Set. Connect to GND for internally set threshold. Connect to resistor-divider for adjustable
output voltages. See
Output Voltage Selection
section for more information.
6
7
CC
SHDN
Compensation Capacitor. Connect a 0.033μF capacitor from CC to GND.
Shutdown Input. Connect to IN for normal operation. Drive
SHDN
low to turn off the regulator.
8
FAULT
Fault Output. A high-impedance, open-drain output. When the MAX8860 is out of regulation,
FAULT
goes
low. In shutdown, the
FAULT
pin is high impedance. Connect to GND if unused.
Detailed Description
The MAX8860 is a low-dropout, low-quiescent-current
linear regulator designed primarily for battery-powered
applications. It supplies an adjustable +1.25V to
+6.5V output voltage or a fixed-voltage output of +1.8V
(MAX8860EUA18), +2.5V (MAX8860EUA25), +2.77V
(MAX8860EUA27), +2.82V (MAX8860EUA28), +3.0V
(MAX8860EUA30), or +3.3V (MAX8860EUA33) for load
currents up to 300mA. The devices with 2.77V and
2.82V nominal outputs are designed to guarantee mini-
mum output voltages of 2.70V and 2.75V, respectively.
The device consists of a +1.25V reference, error amplifi-
er, MOSFET driver, P-channel pass transistor, Dual
Mode comparator, fault detector, and internal-feedback
voltage divider (Figure 1).
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
this reference to the selected feedback voltage and
amplifies the difference. The MOSFET driver reads the
error signal and applies the appropriate drive to the P-
channel pass transistor. If the feedback voltage is lower
than the reference voltage, the pass-transistor gate is
pulled lower, allowing more current to pass and
increasing the output voltage. If the feedback voltage
is higher than the reference voltage, the pass-transistor
gate is driven higher, allowing less current to pass to
the output. The output voltage is fed back through
either an internal resistor voltage divider connected to
OUT, or an external resistor network connected to SET.
The Dual Mode comparator examines V
SET
and selects
the feedback path. If V
SET
is below 60mV, internal
feedback is used and the output voltage is regulated to
the preset output voltage. Additional blocks include an
output current limiter, reverse battery protection, a ther-
mal sensor, a fault detector, and shutdown logic.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8860EUA28+ | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8860EUA28+T | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8860EUA28-T | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8860EUA30 | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8860EUA30+ | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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