isl9440b Intersil Corporation, isl9440b Datasheet - Page 10

• Manufacturer Part Number: isl9440b
• Description: Triple Step-down Pwm And Single Linear Controller With Programmable Soft-start
• Manufacturer: Intersil Corporation

Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V
5.00
5.05
5.04
5.03
5.02
5.01
4.99
4.98
4.97
4.96
4.95
0
FIGURE 2. PWM1 LOAD REGULATION
VIN = 6V
4
LOAD CURRENT (A)
10
8
VIN = 12V
8
7
6
5
4
3
2
1
0
0
MAX = 100µs
PGOOD
12
FIGURE 1. PGOOD AND RST TIMING
VIN = 19V
ISL9440B, ISL9440C
5
V
V
REGULATION
IN
OUT
16
TIME (NOT TO SCALE)
= 5.5V FALLING/
1-4 OUT OF
MAX = 6.5µs
10
V
V
V
V
IN
OUT
IN
OUT
IN
TYP = 200ms
= 5.5V RISING/
15
FIGURE 3. PWM1 EFFICIENCY vs LOAD (V
= 5.5V RISING/
MAX = 2µs
= 19V Unless Otherwise Noted).
1-4 IN REGULATION
100
1-4 IN REGULATION
95
90
85
80
75
70
65
60
0.4V
2.4V
V
0
IN
/V
OUT
20
RJK0305DPB FOR UPPER MOSFET AND
RJK0301DPB FOR LOWER MOSFET
2
V
IN
RST
= 16VDC
4
25
V
IN
LOAD CURRENT (A)
= 19VDC
6
8
V
IN
10
= 23VDC
O
12
= 5.0V),
January 15, 2009
14
FN6799.0
16