SC900A Просмотр технического описания (PDF) - Semtech Corporation
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SC900A Datasheet PDF : 23 Pages
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SC900A
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Parameter
Symbol
Conditions
Min
LDO Regulator D (Cont.)
Maximum Output Current
IOMAXD
150
Default Setting: OFF
VOD
Line Regulation at 3.10V
LINEREGD IOUT = 1mA, VOUT + 0.15V < VIN < 5.5V
Load Regulation at 3.10V
LOADREGD
1mA < IOUT <150mA
Dropout Voltage
Power Supply Rejection Ratio
VDD
PSRRD
Output Voltage Noise(2)
en-D
VOUT = 3.3V, IOUT = 150mA
f = 10Hz - 1kHz, CBYP = 0.1mF,
IOUT = 50mA,
2.5V ≤ VOUT ≤ 3.3V
f = 10Hz - 100kHz, IOUT = 50mA,
CVREF = 0.1μF, COUT = 2.2μF,
2.5V ≤ VOUT ≤ 3.3V
LDO Regulator E
Output Voltage Accuracy
VOAE
1.75V ≤ VOUT ≤ 3.30V
VOUT + 0.15V ≤ VIN ≤ 5.5V
-3
IOUT = 1mA, TA = 25°C
Output Voltage Accuracy at
3.10V (DAC = 10111)
Maximum Output Current
Default Setting: OFF
Line Regulation at 3.10V
Load Regulation at 3.10V
VOASE
IOUT = 1mA
-2
VOUT + 0.5V ≤ VIN ≤ 5.5V,
IOUT = 150mA
-3.5
IOMAXE
150
VOE
LINEREGE IOUT = 1mA, VOUT + 0.15V < VIN < 5.5V
LOADREGE
1mA < IOUT = 150mA
Dropout Voltage
VDE
VOUT = 3.3V, IOUT = 150mA
Power Supply Rejection Ratio PSRRE
Output Voltage Noise(2)
en-E
A RESET
f = 10Hz - 1kHz, CBYP = 0.1μF,
IOUT = 50mA,
2.5V ≤ VOUT ≤ 3.3V
f = 10Hz - 100kHz, IOUT = 50mA,
CVREF = 0.1μF, COUT = 2.2μF,
2.5V ≤ VOUT ≤ 3.3V
Reset Threshold
RESETTHLD
Reset Active Timeout Delay
tRD
Delay in default state
75
LDO POWER GOOD
PGOOD Threshold
PGOODTHLD
PGOOD Active Timeout Delay
tPG
Delay in default state
75
Notes:
1) Digital outputs are powered from LDOB, so LDOB must be active for operation of LDOPGD and ARST.
2) Below 2.5V: becomes digital regulator.
© 2005 Semtech Corp.
5
Typ
3.10
2.5
-3
150
60
55
3.10
2.5
-3
150
60
55
77
100
77
100
Max Units
mA
V
12
mV
-20
mV
190
mV
dB
μVRMS
+3
%
+2
%
+3.5
%
mA
V
12
mV
-20
mV
190
mV
dB
μVRMS
%
125
ms
%
125
ms
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