參數(shù)資料
型號(hào)： MAX1857
廠商： Maxim Integrated Products, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA
中文描述： 500mA、具有紋波抑制的LDO，µMAX封裝
文件頁(yè)數(shù)： 3/10頁(yè)
文件大小： 245K
代理商： MAX1857
M
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(V
IN
= +5.25V, V
OUT
= 4.75V,
SHDN
= IN, SET = GND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)
((V
IN
= +5.25V, V
OUT
= 4.75V,
SHDN
= IN, SET = GND,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RESET OUTPUT
Reset Output Low Voltage
V
OL
RST
sinking 1mA
0.01
0.1
V
Operating Voltage Range for
Valid Reset
RST
sinking 100
μ
A
1.0
5.5
V
RST
Output High Leakage
Current
V
RST
= +5.5V
100
nA
RST
Threshold
RST
Release Delay
THERMAL PROTECTION
Ther m al S hutd ow n Tem p er atur e
Thermal Shutdown Hysteresis
Rising edge, referred to V
OUT(NOMINAL)
Rising edge of OUT to rising edge of
RST
83
1.4
86
4.5
89
8
%
ms
t
RP
T
SHDN
T
SHDN
170
20
°
C
°
C
PARAMETER
SYMBOL
V
IN
V
UVLO
CONDITIONS
MIN
2.5
2.0
MAX
5.5
2.3
UNITS
V
V
Input Voltage
Input Undervoltage Lockout
Rising or falling
Output Voltage Accuracy
(Preset Mode)
V
OUT
I
OUT
= 1mA to 500mA
-3
+3
%
Adjustable Output Voltage
Range
V
SET
= 1.25V
1.25
5
V
SET Voltage Threshold
(Adjustable Mode)
V
SET
I
OUT
= 100mA
1.212
1.288
V
Maximum Output Current
Short-Circuit Current Limit
SET Dual Mode Threshold
SET Input Bias Current
Ground-Pin Current
I
OUT
I
LIM
500
0.55
50
-100
mA
RMS
A
mV
nA
μA
V
OUT
= 0
2.2
150
+100
250
I
SET
I
Q
V
IN
-
V
OUT
V
SET
= 1.25V
I
OUT
= 1mA
Dropout Voltage (Note 1)
I
OUT
= 500mA
175
mV
Line Regulation
V
LNR
V
IN
from (V
OUT
+ 100mV) to 5.5V,
I
LOAD
= 5mA
I
OUT
= 1mA to 500mA
-0.15
+0.15
%/V
Load Regulation
SHUTDOWN
Shutdown Supply Current
V
LDR
1.0
%
I
OFF
V
IH
V
IL
SHDN
= GND, V
IN
= +5.5V
2.5V < V
IN
< 5.5V
2.5V < V
IN
< 5.5V
SHDN
= IN or GND
15
μA
1.6
SHDN
Input
Threshold
0.6
100
V
SHDN
Input Bias Current
nA
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MAX1857EUA47 功能描述:低壓差穩(wěn)壓器 - LDO 500mA Ripple-Rejecting 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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
MAX1857EUA47+ 功能描述:低壓差穩(wěn)壓器 - LDO 500mA Ripple-Rejecting 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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
MAX1857EUA47+T 功能描述:低壓差穩(wěn)壓器 - LDO 500mA Ripple-Rejecting 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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
MAX1857EUA47-T 功能描述:低壓差穩(wěn)壓器 - LDO 500mA Ripple-Rejecting 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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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