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| 型号： | MAX8869EUE18+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V/ADJ 1A 16-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 1.8V，0.8 V ~ 5 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
MAX8869
1A, Microcap, Low-Dropout,
Linear Regulator
IN
SHUTDOWN
THERMAL
MAX8869
ERROR AMP
MOSFET DRIVER
SENSOR
SHDN
SHUTDOWN
LOGIC
WITH FOLDBACK
CURRENT LIMIT
V SS
PMOS
OUT
92% V OUT
DETECTOR
IN
DELAY TIMER
RST
736mV
3ms
OUT
NMOS
0.8V
REFERENCE
SET
6 μ A
DUAL MODE
80mV
R1
SS
V SS
COMPARATOR
R2
GND
Figure 1. Functional Diagram
where V SET = +0.8V. To simplify resistor selection:
MAX8869
R1 = R2 (V OUT / V SET - 1)
IN
OUT
Since the input bias current at SET is nominally 50nA,
V IN
C IN
1 μ F
IN
IN
IN
OUT
OUT
OUT
C OUT
1 μ F
V OUT
large resistance values can be used for R1 and R2 to
minimize power consumption without losing efficiency.
Up to 80k ? is acceptable for R2.
ON
OFF
C SS
SHDN
SS
RST
SET
GND
RESET
OUTPUT
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
Figure 2. Typical Operating Circuit with Preset Output Voltage
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)
Maxim Integrated
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%
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8869EUE25 | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8869EUE25+ | 功能描述:低压差稳压器 - LDO 1A MicroCap Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8869EUE25+T | 功能描述:低压差稳压器 - LDO 1A MicroCap Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8869EUE25-T | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8869EUE33 | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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