ISL78020 Datasheet, PDF (8/19 Pages) Intersil Corporation – Automotive Grade TFT-LCD DC/DC with Integrated Amplifiers

ISL78020, ISL78022
Typical Performance Curves T_A = +25°C, unless otherwise specified. (Continued)
BOOST OUTPUT
VOLTAGE
(AC COUPLING)
BOOST OUTPUT
CURRENT
V_BOOST = 12V
C_OUT = 30µF
FIGURE 7. BOOST PULSE LOAD TRANSIENT RESPONSE
0
-0.05
V_ON = 20V
-0.10
-0.15
-0.20
-0.25
5
10
15
20
25
30
V_ON LOAD CURRENT (mA)
FIGURE 8. V_ON LOAD REGULATION
0
-0.02
-0.04
-0.06
-0.08
-0.10
-0.12
20
V_ON = 20V
I_LOAD = 20mA
21 22 23 24 25 26
INPUT VOLTAGE (V)
FIGURE 9. V_ON LINE REGULATION
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
5
V_OFF = -8V
10
15
20
25
30
LOAD CURRENT (mA)
FIGURE 10. V_OFF LOAD REGULATION
0
-0.1
-0.2
-0.3
-0.4
-0.5 ^VOFF ^{= -8V}
I_LOAD = 50mA
-0.6
-15
-14
-13
-12
-11
-10
INPUT VOLTAGE (V)
FIGURE 11. V_OFF LINE REGULATION
V_CDEL
V_BOOST
V_OFF
V_ON
TIME (20ms/DIV)
FIGURE 12. START-UP SEQUENCE
8
FN6386.2
December 6, 2007