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ISL8088IRZ-TK

Description
IC REG BUCK ADJ 0.8A DL 10DFN
Categorysemiconductor    Power management   
File Size2MB,18 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
Environmental Compliance
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ISL8088IRZ-TK Overview

IC REG BUCK ADJ 0.8A DL 10DFN

ISL8088IRZ-TK Parametric

Parameter NameAttribute value
Functionstep down
Output configurationjust
Topologystep down
Output typeAdjustable
Number of outputs2
Voltage - Input (minimum)2.75V
Voltage - input (maximum)5.5V
Voltage - Output (minimum/fixed)0.6V
Voltage - Output (maximum)5.5V
Current - Output800mA
Frequency - Switch2.25MHz
Synchronous rectifieryes
Operating temperature-40°C ~ 85°C(TA)
Installation typesurface mount
Package/casing10-VDFN Exposed Pad
Supplier device packaging10-DFN(3x3)
DATASHEET
ISL8088
Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck
Regulator
The ISL8088 is a high efficiency, dual synchronous step-down
DC/DC regulator that can deliver up to 800mA continuous
output current per channel. The supply voltage range of 2.75V
to 5.5V allows the use of a single Li+ cell, three NiMH cells or a
regulated 5V input. The current mode control architecture
enables very low duty cycle operation at high frequency with
fast transient response and excellent loop stability. The
ISL8088 operates at 2.25MHz switching frequency allowing
the use of small, low cost inductors and capacitors. Each
channel is optimized for generating an output voltage as low
as 0.6V.
The ISL8088 has a user configurable mode of operation-forced
PWM mode and PFM/PWM mode. The forced PWM mode
operation reduces noise and RF interference while the PFM
mode operation provides high efficiency by reducing switching
losses at light loads. In PFM mode of operation, both channels
draw a total quiescent current of only 30µA hence enabling
high light load efficiency in order to maximize battery life.
The ISL8088 offers a 1ms Power-Good (PG) to monitor both
output at power-up. When shutdown, ISL8088 discharges the
outputs capacitor. Other features include internal digital soft-
start, enable for power sequence, overcurrent protection, and
thermal shutdown. The ISL8088 is offered in a 3mmx3mm 10
Ld DFN package with 1mm maximum height. The complete
converter occupies less than 1.8cm
2
area.
FN6858
Rev 2.00
May 26, 2011
Features
• Internal Current Mode Compensation
• 100% Maximum Duty Cycle for Lowest Dropout
• Selectable Forced PWM Mode and PFM Mode
• External Synchronization up to 4MHz
• Start-up with Pre-biased Output
• Soft-Stop Output Discharge During Disabled
• Internal Digital Soft-Start - 2ms
• Power-Good (PG) Output with 1ms Delay
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Test and Measurement Systems
• Li-ion Battery Power Devices
• Bar Code Readers
100
90
EFFICIENCY (%)
80
70
60
50
40
1.8V
OUT
-PWM
VIN = 5V
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1.8V
OUT
-PFM
2.5V
OUT
-PWM
2.5V
OUT
-PFM
OUTPUT LOAD (A)
FIGURE 1. EFFICIENCY CHARACTERISTICS CURVE
FN6858 Rev 2.00
May 26, 2011
Page 1 of 18

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