ISL6232 Datasheet, PDF (9/25 Pages) Intersil Corporation – High Efficiency System Power Supply Controller for Notebook Computers

ISL6232
Typical Operating Performance Circuit in Figure 29, no load on LDO5, LDO3, OUT3 OUT5, and REF, VIN = 12V,
EN3 = EN5 = VCC, SHDN# = VIN, T_A = 25°C, unless otherwise noted. (Continued)
3.5
5.20
3.4
3.3
EN3 = 0
5.15
5.10
5.05
EN5 = V_CC
3.2
5.00
3.1
EN3 = V_CC
3.0
4.95
EN5 = 0
4.90
4.85
2.9
0
10 20 30 40 50 60 70 80 90 100
LDO3 OUTPUT CURRENT (mA)
4.80
0
10 20 30 40 50 60 70 80 90 100
LDO3 OUTPUT CURRENT (mA)
FIGURE 19. LDO3 REGULATION OUTPUT VOLTAGE vs
OUTPUT CURRENT
FIGURE 20. LDO5 REGULATION OUTPUT VOLTAGE vs
OUTPUT CURRENT
2.00
1.99
1.98
1.97
1.96
1.95
-10 0
10 20 30 40 50 60 70 80 90 100
I_REF (µA)
FIGURE 21. REFERENCE VOLTAGE vs OUTPUT CURRENT
VIN
(5V/DIV)
LDO3
(1V/DIV)
LDO5
(2V/DIV)
REF
(1V/DIV)
FIGURE 22. REF, LDO3, AND LDO5 POWER-UP
EN
(2V/DIV)
V_OUT3
(2V/DIV)
V_OUT5
(2V/DIV)
FIGURE 23. DELAYED START WAVEFORMS (EN5 = REF)
9
EN5
(2V/DIV)
V_OUT3
(2V/DIV)
V_OUT5
(2V/DIV)
FIGURE 24. DELAYED START WAVEFORMS (EN3 = REF)
FN9116.1
April 20, 2009