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SI91821 Datasheet, PDF (3/10 Pages) Vishay Siliconix – Micropower 300-mA CMOS LDO Regulator With Error Flag
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Si91821
Vishay Siliconix
SPECIFICATIONS
Parameter
Symbol
Test Conditions
Unless Otherwise Specified
VIN = VOUT(nom) + 1 V, IOUT = 1 mA
CIN = 2.2 mF, COUT = 2.2 mF, VSD = 1.5 V
Limits
−40 to 85_C
Tempa Minb Typc Maxb
Unit
Dynamic Line Regulation
Dynamic Load Regulation
Turn-on Overshoot
VOUT Turn-On-Time
Thermal Shutdown
Thermal Shutdown Junction Temp
Thermal Hysteresis
Short Circuit Current
Shutdown Input
SD Input Voltage
SD Input Currente
Shutdown Hysteresis
Error Output
Output High Leakage
Output Low Voltage
Power_Good Trip Threshold f, g
(Rising)
Hysteresisf
Error Delay
DVO(line)
DVO(load)
DVOOS
tON
TJ(s/d)
THYST
ISC
VIH
VIL
IIH
IIL
VHYST
IOFF
VOL
VTH
VHYST
tDELAY
VIN : VOUT(nom) + 1 V to VOUT(nom) + 2 V
tr/tf = 5 ms, IOUT = 250 mA
IOUT : 1 mA to 150 mA, tr/tf = 2 ms
VIN followed by SD = High Event
CNOISE v 100 nF
COUT = 10 mF, VOUT to 90% of final value,
VIN = 3.6 V
Room
Room
Room
Room
10
mV
30
2.5
%
350
mS
VOUT = 0 V
Room
165
_C
Room
20
Room
800
mA
High = Regulator ON (Rising)
Low = Regulator OFF (Falling)
VSD = 0 V, Regulator OFF
VSD = 6 V, Regulator ON
Full
1.5
Full
VIN
V
0.4
Room
0.01
mA
Room
1.0
Full
100
mV
ERROR = VOUT(nom)
ISINK = 2 mA
CNOISE v 100 nF
Full
0.01
2
mA
Full
0.4
Full
0.93 x
VOUT
0.95 x
VOUT
0.97 x
VOUT
V
Room
2% x
VOUT
Full
10
mS
Notes
a. Room = 25_C, Full = −40 to 85_C.
b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing and are measured at TA = 25_C.
d. The dropout voltage is defined as VIN − VOUT when VOUT is 100 mV below the value of VOUT for VIN = VOUT + 2 V. This is applicable for voltages of 2.5 V or
higher.
e. The device’s shutdown pin includes a typical 6-MW internal pull-down resistor connected to ground.
f. VOUT is defined as the output voltage of the DUT at 1 mA.
g. Typical only, from VOUT = 2.0 V to VOUT = 1.5 V.
Document Number: 71614
S-51147–Rev. E, 20-Jun-05
www.vishay.com
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