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ISL62870 Datasheet

PWM DC/DC Voltage Regulator Controller

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ISL62870
PWM DC/DC Voltage Regulator Controller
The ISL62870 IC is a Single-Phase Synchronous-Buck
PWM voltage regulator featuring Intersil’s Robust Ripple
Regulator (R3) Technology™. The ISL62870 provides a low
cost solution for compact high performance applications.The
wide 3.3V to 25V input voltage range is ideal for systems
that run on battery or AC adapter power sources. Resistor
programmed output voltage setpoint and capacitor
programmed soft-start delay allow for fast and easy
implementation. Robust integrated MOSFET drivers and
Schottky bootstrap diode reduce the implementation area and
lower component cost.
Intersil’s R3 Technology™ combines the best features of
both fixed-frequency and hysteretic PWM control. The PWM
frequency is 300kHz during static operation, becoming
variable during changes in load, setpoint voltage, and input
voltage when changing between battery and AC adapter
power. The modulators ability to change the PWM switching
frequency during these events in conjunction with external
loop compensation produces superior transient response.
For maximum efficiency, the converter automatically enters
diode-emulation mode (DEM) during light-load conditions
such as system standby.
Pinout
ISL62870
(16 LD 2.6X1.8 µTQFN)
TOP VIEW
GND 1
EN 2
NC 3
SREF 4
12 BOOT
11 UGATE
10 PHASE
9 OCSET
DATASHEET
FN6708
Rev 0.00
August 14, 2008
Features
• Input Voltage Range: 3.3V to 25V
• Output Voltage Range: 0.5V to 3.3V
• Output Load to 30A
• Simple Resistor Programming for Output Voltage
• ±0.75% System Accuracy: -10°C to +100°C
• Capacitor Programming for Soft-Start Delay
• Fixed 300kHz PWM Frequency in Continuous Conduction
• External Compensation Affords Optimum Control Loop
Tuning
• Automatic Diode Emulation Mode for Highest Efficiency
• Integrated High-Current MOSFET Drivers and Schottky
Boot-Strap Diode for Optimal Efficiency
• Choice of Overcurrent Detection Schemes
- Lossless Inductor DCR Current Sensing
- Precision Resistive Current Sensing
• Power-Good Monitor for Soft-Start and Fault Detection
• Fault Protection
- Undervoltage
- Overvoltage
- Overcurrent (DCR-Sense or Resistive-Sense Capability)
- Over-Temperature Protection
- Fault Identification by PGOOD Pull-Down Resistance
• Pb-Free (RoHS Compliant)
Applications
• Mobile PC Graphical Processing Unit VCC Rail
• Mobile PC I/O Controller Hub (ICH) VCC Rail
• Mobile PC Memory Controller Hub (GMCH) VCC Rail
Ordering Information
PART NUMBER
(Note)
PART
MARKING
TEMP RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL62870HRUZ
GAL
-10 to +100
16 Ld 2.6x1.8 µTQFN
L16.2.6x1.8A
ISL62870HRUZ-T*
GAL
-10 to +100
16 Ld 2.6x1.8 µTQFN
L16.2.6x1.8A
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and
NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
FN6708 Rev 0.00
August 14, 2008
Page 1 of 17


Renesas Electronics Components Datasheet

ISL62870 Datasheet

PWM DC/DC Voltage Regulator Controller

No Preview Available !

Block Diagram
FB
SREF
GND
EN
EA
VCOMP
100pF
VSET
VCC
POR
FAULT
VW
RUN
H
L
IN
PWM
RUN
DRIVER
OTP
SHOOT-THROUGH
PROTECTION
PWM RUN DRIVER
gmVIN
VCC
Cr
VR
gmVO
100k
BOOT
UGATE
PHASE
PVCC
LGATE
PGND
VREF
500mV
OVP
FB
UVP
FAULT
OCP
FIGURE 1. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM OF ISL62870
IOCSET
10µF
VO
OCSET
PGOOD


Part Number ISL62870
Description PWM DC/DC Voltage Regulator Controller
Maker Renesas
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ISL62870 Datasheet PDF






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