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参数资料
| 型号： | ISL9104AIRUWEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 1 FOR ISL9104AIRUW |
| 标准包装： | 1 |
| 系列： | * |
500mA 4.3MHz Low I Q High Efficiency Synchronous
Buck Converter
ISL9104, ISL9104A
The ISL9104, ISL9104A is a 500mA, 4.3MHz step-down
regulator, which is ideal for powering low-voltage
microprocessors in compact devices such as PDAs and cellular
phones. It is optimized for generating low output voltages
down to 0.8V. The supply voltage range is from 2.7V to 6V
allowing the use of a single Li+ cell, three NiMH cells or a
regulated 5V input. It has guaranteed minimum output current
of 500mA. A high switching frequency of 4.3MHz pulse-width
modulation (PWM) allows using small external components.
Under light load condition, the device operates at low I Q skip
mode with typical 20μA quiescent current for highest light
load efficiency to maximize battery life, and it automatically
switches to fixed frequency PWM mode under heavy load
condition.
The ISL9104, ISL9104A includes a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
system efficiency and minimize the external component count.
100% duty-cycle operation allows less than 300mV dropout
voltage at 500mA.
The ISL9104, ISL9104A offers internal digital soft-start,
enable for power sequence, overcurrent protection and
thermal shutdown functions. In addition, the ISL9104,
ISL9104A offers a quick bleeding function that discharges the
output capacitor when the IC is disabled.
The ISL9104, ISL9104A is offered in a 1.6x1.6mm μTDFN
package. The complete converter occupies less than 0.5CM 2 .
Applications
? Single Li-ion Battery-Powered Equipment
? Mobile Phones and MP3 Players
? PDAs and Palmtops
? WCDMA Handsets
? Portable Instruments
Pin Configuration
ISL9104, ISL9104A
(6 LD 1.6x1.6 μTDFN)
TOP VIEW
Features
? High Efficiency Integrated Synchronous Buck Regulator with
up to 93% Efficiency
? 2.7V to 6.0V Supply Voltage
? 4.3MHz PWM Switching Frequency
? 500mA Guaranteed Output Current
? 3% Output Accuracy Over-Temperature and Line for Fixed
Output Options
? 20μA Quiescent Supply Current in Skip Mode
? Less than 1μA Logic Controlled Shutdown Current
? 100% Maximum Duty Cycle for Lowest Dropout
? Ultrasonic Switching Frequency at Skip Mode to Prevent
Audible Frequency Noise (For ISL9104A Only)
? Discharge Output Capacitor when Disabled
? Internal Digital Soft-Start
? Peak Current Limiting, Short Circuit Protection
? Over-Temperature Protection
? Chip Enable
? Small 6 Pin 1.6mmx1.6mm μTDFN Package
? Pb-Free (RoHS Compliant)
Related Literature
? See AN1522 , “ISL9104xxxxEVAL1Z, ISL9104AxxxxEVAL1Z
Evaluation Board Application Manual”
100
95
90
85
VIN 1
EN 2
NC 3
6 SW
5 GND
4 FB
80
75
70
65
60
55
V IN = 2.7V
V OUT = 1.8V
L = 1μH
50
1
10
100
1000
I OUT (mA)
FIGURE 1. EFFICIENCY vs OUTPUT CURRENT
September 21, 2011
FN6829.5
1
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. 2008, 2009, 2011. 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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