8188 Datasheet, PDF (3/12 Pages) Allegro MicroSystems – LOW-DROPOUT REGULATORS . HIGH EFFICIENCY

8188
LOW-DROPOUT
REGULATORS
A8188SL-xx Maximum Allowable Total Average Output Current* with device mounted on 2.24" x
2.24" (56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.
T_A
25°C
Allowable Total Average (10 ms) Output Current in Milliamperes with T_J = 150°C, Duty Cycle = 100%†
V_I - V_O
1.0
1.5
2.0
2.5
3.0
4.0
5 .0
6.0
7.0*
500
500
500
460
385
285
230
190
165
50°C
500
500
460
370
305
230
185
150
130
70°C
500
490
370
295
245
185
145
120
105
85°C
500
400
300
240
200
150
120
100
85
* Absolute maximum peak output current rating for either output is 250 mA; absolute maximum input voltage is 10 V.
† I_O = (T_J – T_A)/([V_I – V_O] R_θJA x dc) = (150 – T_A)/([V_I – V_O] x 108 x 1.00)
Output current rating can be increased (to 250 mA maximum per output) by additional heat sinking or reducing the duty
cycle. Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These
conditions can be tolerated but should be avoided.
A8188SLT-xx Maximum Allowable Output Current with device mounted on 2.24" x 2.24" (56.9 mm
x 56.9 mm) solder-coated copper-clad board in still air.
T_A
25°C
Allowable Average (10 ms) Output Current in Milliamperes with T_J = 150°C, Duty Cycle = 100%†
V_I - V_O
1.0
1.5
2.0
2.5
3.0
4.0
5.0
6.0
7.0*
250
250
240
190
160
120
95
80
65
50°C
250
250
190
155
125
95
75
65
55
70°C
250
205
155
120
100
75
60
50
40
85°C
250
165
125
100
80
60
50
40
35
* Absolute maximum input voltage is 10 V.
† I_O = (T_J – T_A)/([V_I – V_O] R_θJA x dc) = (150 – T_A)/([V_I – V_O] x 258 x 1.00)
Output current rating can be increased (to 250 mA maximum) by additional heat sinking or reducing the duty cycle.
Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
www.allegromicro.com