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| 型号： | MAX1735EUK25+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO -2.5V/ADJ .2A SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 负固定式或可调式 |
| 输出电压： | -2.5V，-1.25 V ~ -5.5 V |
| 输入电压： | -2.5 V ~ -6.5 V |
| 电压 - 压降（标准）： | 0.08V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA（最小） |
| 电流 - 限制（最小）： | 1.02A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 其它名称： | MAX1735EUK25+TDKR |
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
IN
C IN
SHUTDOWN
THERMAL
SENSOR
NMOS
PASS
TRANSISTOR
LOGIC
OUT
GND
ON
OFF
ON
SHDN
ERROR
MAX1735
C OUT
AMPLIFIER
R1
V REF
-1.25V
SET
Dual Mode
COMPARATOR
R2
-270mV
GND
Figure 1. Functional Diagram
Detailed Description
The MAX1735 is a low-dropout negative linear voltage
regulator. It features Dual Mode operation, allowing a
fixed -5.0V, -3.0V, or -2.5V output voltage or an
adjustable output from -1.25V to -5.5V. The regulator is
guaranteed to supply 200mA of output current. It fea-
tures 60dB power-supply rejection for noise-sensitive
applications and a low 85μA operating current that opti-
mizes it for battery-operated devices.
As Figure 1 illustrates, the device consists of an internal
-1.25V reference, an error amplifier, an N-channel
MOSFET, an internal precision-trimmed feedback volt-
age-divider, and a Dual Mode comparator.
The -1.25V reference is connected to the inverting input
of the error amplifier. The error amplifier compares the
reference voltage with the selected feedback voltage
and amplifies the difference. The error amplifier drives
the MOSFET to control the output voltage.
The feedback voltage for regulation is generated by
either an internal or external resistive voltage-divider
connected from OUT to SET. The internal Dual Mode
comparator selects the feedback path based on V SET .
Connect SET to GND to use the internal feedback path,
setting the output voltage to the preset value. If an
external voltage-divider is used, see Output Voltage
Selection .
Internal N-Channel MOSFET
The MAX1735 features an N-channel MOSFET pass
transistor. Unlike similar designs using NPN bipolar
pass transistors, N-channel MOSFETs require extreme-
ly low drive currents, reducing overall quiescent cur-
rent. Also, NPN-based regulators consume still more
base current in dropout conditions when the pass tran-
sistor saturates. The MAX1735 does not suffer from
these problems, consuming only 125μA total current at
full load and in dropout.
Output Voltage Selection
The MAX1735 features Dual Mode operation, allowing for
a preset or adjustable output voltage. In preset voltage
mode, the output of the MAX1735 is set to -5.0V, -3.0V, or
-2.5V (see Ordering Information ). Select this mode by
connecting SET to GND (Figure 2).
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1735EUK30 | 制造商:Maxim Integrated Products 功能描述:200MA, NEGATIVE OUTPUT, LOW-DROPOUT LINEAR RE - Cut Tape Product |
| MAX1735EUK30+ | 制造商:Maxim Integrated Products 功能描述:REG LDO LIN ADJ/FIX NEG -1.25V TO -5.5V/-3V -0.2A 5PIN SOT-2 - Bulk |
| MAX1735EUK30+T | 功能描述:低压差稳压器 - LDO 200mA Negative Output 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 |
| MAX1735EUK30-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 |
| MAX1735EUK50 | 制造商:Maxim Integrated Products 功能描述:200MA, NEGATIVE OUTPUT, LOW-DROPOUT LINEAR RE 5 PINS SOT PKG - Cut Tape Product |
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