参数资料
型号: MAX1726EUK33+T
厂商: Maxim Integrated Products
文件页数: 5/8页
文件大小: 0K
描述: IC REG LDO 3.3V 20MA 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: 正,固定式
输出电压: 3.3V
输入电压: 最高 12V
电压 - 压降(标准): 0.3V @ 20mA
稳压器数量: 1
电流 - 输出: 20mA(最小)
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: MAX1726EUK33+TDKR
MAX1725/MAX1726
12V, Ultra-Low I Q , Low-Dropout
Linear Regulators
The error amplifier compares 1.245V to the selected
feedback voltage and amplifies the difference. If the
feedback voltage is lower than 1.245V, the pass-tran-
sistor gate is pulled lower, allowing more current to
pass, and thus increasing the output voltage. If the
feedback voltage is higher than 1.245V, the pass-tran-
sistor 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 con-
nected to OUT (MAX1726) or an external resistor net-
work connected to FB (MAX1725). Additional features
include an output current limiter, reverse-battery protec-
tion, a thermal sensor, and shutdown logic.
INPUT
2.5V TO 12V
OUTPUT
1.5V TO 5V
Internal P-Channel Pass Transistor
The MAX1725/MAX1726 feature a p-channel MOSFET
C IN
1 μ F
IN
MAX1725
OUT
R1
C OUT
1 μ F
pass transistor. This provides advantages over similar
designs using PNP pass transistors, including longer
battery life. The p-channel MOSFET requires no base
drive, which reduces quiescent current considerably.
PNP-based regulators waste considerable current in
OFF
ON
SHDN
GND
FB
R2
1.2M ?
dropout when the pass transistor saturates; they also
use high base-drive currents under large loads. The
MAX1725/MAX1726 do not suffer from these prob-
lems, and consume only 2μA of quiescent current
throughout their load range (see the Typical Operating
Figure 1. Typical Application Circuit
IN
MAX1725
MAX1726
Characteristics).
OUT
BIAS
CIRCUITRY
THERMAL
SHUTDOWN
1.245V
(MAX1726 ONLY)
SHDN
FB (MAX1725 ONLY)
GND
Figure 2. Functional Diagram
Maxim Integrated
5
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