SI91871_05 Datasheet, PDF (2/10 Pages) Vishay Siliconix – 300-mA Ultra Low-Noise LDO Regulator With Discharge Option

Si91871
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Input Voltage, V_IN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.0 to 6.5 V
V_SD (See Detailed Description) . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V_IN
Output Current, I_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . Short Circuit Protected
Output Voltage, V_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . _−0.3 V to V_IN + 0.3 V
Package Power Dissipation, (P_d)^b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 W
Thermal Resistance (q_JA)^a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55_C/W
R_(qJA)a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8_C/W
Maximum Junction Temperature, T_J(max) . . . . . . . . . . . . . . . . . . . . . . . 150_C
Storage Temperature, T_STG . . . . . . . . . . . . . . . . . . . . . . . . . . −65_C to 150_C
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 20 mW/_C above T_A = 25_C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Input Voltage, V_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 V to 6 V
Input Voltage, V_SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V_IN
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 300 mA
C_IN, C_OUTa (Ceramic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 mF
C_EB (Ceramic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01 mF
Operating Ambient Temperature, T_A . . . . . . . . . . . . . . . . . . . . −40_C to 85_C
Operating Junction Temperature, T_J . . . . . . . . . . . . . . . . . . . −40_C to 125_C
Notes
a. Maximum ESR of C_OUT: 0.2 W.
SPECIFICATIONS
Parameter
Symbol
Test Conditions Unless Specified
T_A = 25_C, V_IN = V_OUT(nom) + 1 V
I_OUT = 1 mA, C_IN = 2 mF, C_OUT = 2.0 mF
V_SD = 1.5 V
Limits
−40 to 85_C
Temp^{a Minb Typc Maxb}
Unit
Start-Up BP Current
Input Voltage Range
Output Voltage Accuracy
I_OUT
V_IN
ON/OFF = High
1 mA v I_OUT v 300 mA
V_OUT w 1.8 V
V_OUT = 1.2 V, 1.5 V
Line Regulation (V_OUT v 3 V)
Line Regulation
(3.0 V < V_OUT v3.6 V)
DV_OUT 100
DV_IN V_OUT(nom)
From V_IN = V_OUT(nom) + 1 V to V_OUT(nom) + 2 V
Line Regulation (5-V Version)
From V_IN = 5.5 V to 6 V
I_OUT = 1 mA
Dropout Voltage^{d, g}
(V_OUT(nom) w 2.6 V)
V_IN − V_OUT
I_OUT = 50 mA
I_OUT = 300 mA
Dropout Voltage^{d, g}
(V_OUT(nom) t 2.6 V, V_IN w
2 V)
I_OUT = 50 mA
I_OUT = 300 mA
Ground Pin Current^{e, g}
(V_OUT(nom) v 3 V)
Ground Pin Current^e
(V_OUT(nom) u 3 V)
Peak Output current
I_GND
I_O(peak)
I_OUT = 0 mA
I_OUT = 300 mA
I_OUT = 0 mA
I_OUT = 300 mA
V_OUT w 0.95 x V_OUT(nom). t_PW = 2 ms
Room
Full
Room
Full
Room
Full
Full
Full
Full
Room
Room
Full
Room
Full
Room
Full
Room
Full
Room
Full
Room
Full
Room
Full
Room
Full
Full
2
−2.0
−3.0
−2.5
−3.5
−0.06
0
0
400
www.vishay.com
2
1
mA
6
V
1
2.0
1
3.0
%
1
2.5
1
3.5
0.18
0.3
%/V
0.4
1
45
80
50
90
300
350
415
mV
65
100
120
400
520
570
100
150
180
130
200
330
mA
110
170
200
150
225
275
mA
Document Number: 72012
S-51147—Rev. F, 20-Jun-05