參數(shù)資料
型號： MAX8869EUE25
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 1A, MicroCap, Low-Dropout, Linear Regulator
中文描述： FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO16
封裝： 4.40 MM, 1.10 MM HEIGHT, 0.65 MM PITCH, MO-153AC, TSSOP-16
文件頁數(shù)： 7/10頁
文件大?。?/td> 538K
代理商： MAX8869EUE25
Output Voltage Selection
The MAX8869 features Dual Mode operation. Connect
SET to GND (Figure 2) for preset voltage mode (see
Ordering Information
). In adjustable mode, set the out-
put between +0.8V to +5.0V through two external resis-
tors connected as a voltage-divider to SET (Figure 3).
The output voltage is set by the following equation:
V
OUT
= V
SET
(1 + R1 / R2)
where V
SET
= +0.8V. To simplify resistor selection:
R1 = R2 (V
OUT
/ V
SET
- 1)
Since the input bias current at SET is nominally 50nA,
large resistance values can be used for R1 and R2 to
minimize power consumption without losing efficiency.
Up to 80k
is acceptable for R2.
In preset voltage mode, the impedance between SET
and ground should be less than 10k
. Otherwise, spu-
rious conditions could cause the voltage at SET to
exceed the 80mV Dual Mode threshold.
Shutdown
A logic low on
SHDN
disables the MAX8869. In shut-
down, the pass transistor, control circuitry, reference,
and all biases are turned off, reducing supply current to
typically 0.1μA. Connect
SHDN
to IN for normal opera-
tion. In shutdown,
RST
is low and the soft-start capaci-
tor is discharged.
RST
Comparator
The MAX8869 features a low V
OUT
indicator that
asserts when the output voltage falls out of regulation.
The open-drain
RST
goes low when OUT falls 8%
M
1A, MicroCap, Low-Dropout,
Linear Regulator
_______________________________________________________________________________________
7
Figure 1. Functional Diagram
Figure 2. Typical Operating Circuit with Preset Output Voltage
MOSFET DRIVER
WITH FOLDBACK
CURRENT LIMIT
SHUTDOWN
LOGIC
0.8V
REFERENCE
SS
GND
SHDN
IN
OUT
RST
SET
V
SS
6
μ
A
736mV
THERMAL
SENSOR
OUT
DELAY TIMER
IN
3ms
SHUTDOWN
ERROR AMP
DUAL MODE
COMPARATOR
80mV
92% V
OUT
DETECTOR
V
SS
PMOS
NMOS
R1
R2
MAX8869
IN
IN
IN
IN
SHDN
SS
OUT
OUT
OUT
OUT
RST
SET
GND
ON
OFF
C
OUT
1
μ
F
C
IN
1
μ
F
C
SS
OUT
IN
RESET
OUTPUT
MAX8869
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX8869EUE25+ 功能描述:低壓差穩(wěn)壓器 - LDO 1A MicroCap 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8869EUE25+T 功能描述:低壓差穩(wěn)壓器 - LDO 1A MicroCap 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8869EUE25-T 功能描述:低壓差穩(wěn)壓器 - LDO 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8869EUE33 功能描述:低壓差穩(wěn)壓器 - LDO 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8869EUE33+ 功能描述:低壓差穩(wěn)壓器 - LDO 1A MicroCap 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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