isl9440b Intersil Corporation, isl9440b Datasheet - Page 7

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

Electrical Specifications
Maximum Duty Cycle (ISL9440C)
Minimum Duty Cycle (ISL9440C)
FB Bias Current (Note 6)
Peak-to-Peak Sawtooth Amplitude (Note 6)
Ramp Offset
PWM GATE DRIVER CHANNEL 1, 2 (UGATE1, 2; LGATE 1, 2) (Note 6)
Source Current
Sink Current
Upper Drive Pull-Up
Upper Drive Pull-Down
Lower Drive Pull-Up
Lower Drive Pull-Down
Rise Time
Fall Time
PWM GATE DRIVER CHANNEL 3 (UGATE3; LGATE 3) (Note 6)
Sink/Source Current
Upper Drive Pull-Up
Upper Drive Pull-Down
Lower Drive Pull-Up
Lower Drive Pull-Down
Rise Time
Fall Time
LOW DROP OUT CONTROLLER
Drive Sink Current
FB Threshold Voltage
Amplifier Trans-conductance
LDOFB Input Leakage Current (Note 6)
ENABLE1, ENABLE2, ENABLE3 THRESHOLD and SOFT-START CURRENT
EN/SSx Enable Threshold
EN/SSx Soft-Start Charge Current
POWER-GOOD MONITORS
PGOOD Upper Threshold, PWM 1, 2 and 3
PGOOD Lower Threshold, PWM 1, 2 and 3
PGOOD for Linear Controller
PGOOD Low Level Voltage
PGOOD Leakage Current
PARAMETER
7
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. V
values are at T
specified. Temperature limits established by characterization and are not production tested. (Continued)
IN
A
= 5.6V to 24V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7µF, T
= +25°C; Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
ISL9440B, ISL9440C
V
V
VCC_5V = 5.0V
VCC_5V = 5.0V
VCC_5V = 5.0V
VCC_5V = 5.0V
C
C
VCC_5V = 5.0V
VCC_5V = 5.0V
VCC_5V = 5.0V
VCC_5V = 5.0V
C
C
LDOFB = 0.76V
IG4 = 21mA
LDOFB = 0.8V
VEN/SSx = 1.3V
I_SINK = 4mA
PGOOD = 5V
IN
IN
OUT
OUT
OUT
OUT
= 12V
= 5.5V
= 1000pF
= 1000pF
= 1000pF
= 1000pF
TEST CONDITIONS
105.5
MIN
1.1
1.1
50
87
70
A
= -40°C to +85°C, Typical
0.667
0.800
0.025
2000
TYP
1.55
800
400
111
1.6
1.6
0.9
8.0
3.2
1.8
1.3
86
18
18
18
18
91
75
6
1
4
4
8
2
115.5
MAX
1.55
6.0
3.5
2.0
0.4
50
12
12
50
96
80
8
3
8
2
1
January 15, 2009
UNITS
FN6799.0
A/V
mA
mA
mA
mA
nA
nA
µA
µA
ns
ns
ns
ns
%
%
%
%
%
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
V
V
V
V
V
V