SI9185 Datasheet, PDF (4/12 Pages) Vishay Siliconix – Micropower 500-mA CMOS LDO Regulator

Si9185
Vishay Siliconix
SPECIFICATIONS
Parameter
SD Input Current^e
Shutdown Hysteresis
Error Output
Output High Leakage
Output Low Voltage^g
Out-of-Regulation Error Flag
Threshold Voltage (rising)^g
Hysteresis^g
Delay Pin Current Source
Symbol
I_IH
I_IL
V_HYST
Test Conditions
Unless Otherwise Specified
V_IN = V_OUT(nom) + 1 V, I_OUT = 1 mA
C_IN = 2.2 mF, C_OUT = 2.2 mF, V_SD = 1.5 V
V_SD = 0 V, Regulator OFF
V_SD = 6 V, Regulator ON
Limits
–40 to 85_C
Temp^a
Room
Room
Full
Min^b
Typ^c
0.01
1.0
100
Max^b
Unit
mA
mV
I_OFF
V_OL
V_TH
V_HYST
I_DELAY
ERROR = V_OUT(nom)
I_SINK = 2 mA
Full
0.01
2
mA
Full
0.4
Full
0.93 x
V_OUT
0.95 x
V_OUT
0.97 x
V_OUT
V
Room
2% x
V_OUT
Room
1.2
2.2
3.0
mA
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. Typical values for dropout voltage at V_OUT w 2 V are measured at
V_OUT = 3.3 V, while typical values for dropout voltage at V_OUT < 2 V are measured at V_OUT = 1.8 V.
d. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 2% below the output voltage measured with a 1-V
differential, provided that V_IN does not not drop below 2.0 V. When V_OUT(nom) is less than 2.0 V, the output will be in regulation when 2.0 V – V_OUT(nom) is
greater than the dropout voltage specified.
e. The device’s shutdown pin includes a typical 6-MW internal pull-down resistor connected to ground.
f. V_OUT is defined as the output voltage of the DUT at 1 mA.
g. The Error Output (Low) function is guaranteed for V_IN w2.0 V.
TIMING WAVEFORMS
V_IN
t_ON
0.95 V_NOM
V_OUT
V_NOM
ERROR
t_DELAY
FIGURE 4. Timing Diagram for Power-Up
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Document Number: 71765
S-20641—Rev. B, 06-May-02