ISL97642IRTZ-T Intersil, ISL97642IRTZ-T Datasheet - Page 11

• Manufacturer Part Number: ISL97642IRTZ-T
• Description: IC REG TFT-LCD DC/DC 32-TQFN
• Manufacturer: Intersil

Specifications of ISL97642IRTZ-T

• Applications: LCD TV/Monitor
• Current - Supply: 5mA
• Voltage - Supply: 2.6 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The current through MOSFET is limited to 2.8A (typ) peak.
This restricts the maximum output current based on
Equation 3:
I
OMAX
=
⎛
⎝
I
LMT
–
ΔI
--------
2
L
⎞
⎠
FBB
×
V
---------
V
IN
O
I
I
FB
REF
11
FIGURE 17. THE BLOCK DIAGRAM OF THE BOOST CONTROLLER
COMPENSATION
AMPLIFIER
AMPLIFIER
CURRENT
GENERATOR
REFERENCE
GM
SLOPE
COMP
(EQ. 3)
ISL97642
CLOCK
Where ΔI L is peak to peak inductor ripple current, and is set
by Equation 4:
where f
ΔI
LOGIC
PWM
L
=
V
---------
S
L
IN
is the switching frequency.
×
---- -
f
D
S
AND START-UP
SHUTDOWN
BUFFER
CONTROL
I
REF
I
FB
PGND
LX
June 18, 2007
FN6436.0
(EQ. 4)