Advanced Single Universal Pulse-Width Modulation
(PWM) Controller
ISL8130
The ISL8130 is a versatile controller that integrates control,
output adjustment, monitoring and protection functions into a
single package for synchronous buck, standard boost, SEPIC
and flyback topologies.
Features
• Universal controller for multiple DC/DC converters
• Wide input range
- 4.5V to 5.5V
- 5.5V to 28V
The ISL8130 provides simple, single feedback loop, voltage
mode control with fast transient response. The output voltage
of the converter can be precisely regulated to as low as 0.6V.
The switching frequency is adjustable from 100kHz to 1.4MHz.
• Programmable soft-start
• Supports pre-biased load applications
• Resistor-selectable switching frequency
- 100kHz to 1.4MHz
The error amplifier features a 15MHz gain-bandwidth product
and 6V/µs slew rate that enables fast transient response. The
PWM duty cycle ranges from 0% to 100% in transient
conditions. The capacitor from the ENSS pin to ground sets
soft-start slew rate.
• External reference tracking mode
• Fast transient response
- High-bandwidth error amplifier
• Extensive circuit protection functions
- Overvoltage, overcurrent, shutdown
The ISL8130 monitors the output voltage and generates a
PGOOD (power-good) signal when soft-start sequence is
complete and the output is within regulation. A built-in
overvoltage protection circuit prevents the output voltage from
going typically above 115% of the set point. For a buck and
buck-boost configuration, protection from overcurrent
• Pb-free (RoHS compliant)
Applications
• Power supplies for microprocessors/ASICs
• Ethernet routers and switchers
conditions is provided by monitoring the r
of the upper
DS(ON)
MOSFET to inhibit the PWM operation appropriately. This
approach improves efficiency by eliminating the need for a
current sensing resistor. For other topologies, overcurrent
protection is achieved using a current sensing resistor.
• Medical instrument power supplies
Related Literature
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
5.6V to 16V
C
6
C
1
C
5
C
C
3
2
C
4
R
499Ω
1
VIN VCC5
PVCC
R
OCSET
ISEN
cs
MONITOR AND
PROTECTION
E
5mΩ
NSS
RT
L
1
10µH
LGATE
BOOT
47.5kΩ
PGOOD
CDEL
OSC
32V
C
0.1µF
7
R
2
D
1
0.1µF
REF
UGATE
PHASE
-
+
C
C
C
10
9
8
SGND
FB
Q
1
220µF x 2
+
-
R
3
COMP
C
REFIN
11
3.32kΩ
REFOUT
470pF
R
5
C
14
2.2µF
C
12
10kΩ
R
12.1kΩ
6
47nF
R
4
C
15
470pF
174kΩ
FIGURE 1. BOOST CONVERTER
October 5, 2012
FN7954.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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