参数资料
型号: ZLDO1117K25TC
厂商: Diodes Inc
文件页数: 8/14页
文件大小: 0K
描述: IC REG LDO 2.5V 1A TO252-3
产品变化通告: Bond Wire Change 14/Sept/2011
标准包装: 1
稳压器拓扑结构: 正,固定式
输出电压: 2.5V
输入电压: 最高 18V
电压 - 压降(标准): 1.11V @ 1A
稳压器数量: 1
电流 - 输出: 1A(最小值)
电流 - 限制(最小): 1.1A
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: TO-252-3,DPak(2 引线+接片),SC-63
供应商设备封装: TO-252-3
包装: 标准包装
产品目录页面: 1476 (CN2011-ZH PDF)
其它名称: ZLDO1117K25DIDKR
A Product Line of
Diodes Incorporated
ZLDO1117
Typical Application Circuits
Using
V OUT = 1 . 25 ? ? 1 +
?
?
R 2 ?
?
R 1 ?
then the output voltage becomes:
V OUT = 1 . 25 ? ? 1 +
? = 5 . 0 V
Figure 1 Basic Adjustable Regulator with 5V Output
Figure 2 Adjustable Regulator with IADJ Errors
?
?
330 ?
110 ?
V OUT = 1 . 25 ? ? 1 +
? + I ADJ ? R 2
?
?
R 2 ?
R 1 ?
V OUT = 1 . 25 ? ? 1 + + 55 ? 10 ? 6 ? 330 ? = 5 . 02 V ~ 0.4%
Because I ADJ typically is 55 μ A, its effect is negligible in most applications.
? 330 ?
? 110 ?
A.
B.
C.
D.
E.
Output capacitor selection is critical for regulator stability. Larger C out values benefit the regulator by improving transient response and loop
stability.
C ADJ can be used to improve ripple rejection. If C ADJ is used, a C out that is larger in value than C ADJ must be used.
C in is recommended if ZLDO1117 is not located near the power supply filter.
An external diode is recommended to protect the regulator if the input instantaneously is shorted to GND.
This device is designed to be stable with tantalum and MLCC capacitors with an ESR less than 0.47 ? .
ZLDO1117
Document number: DS32018 Rev. 6 - 2
8 of 14
July 2012
? Diodes Incorporated
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