ISL8016 Просмотр технического описания (PDF) - Renesas Electronics
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ISL8016 Datasheet PDF : 22 Pages
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DATASHEET
ISL8016
6A Low Quiescent Current High Efficiency Synchronous Buck Regulator
FN7616
Rev 1.00
May 5, 2011
The ISL8016 is a high efficiency, monolithic, synchronous
step-down DC/DC converter that can deliver up to 6A
continuous output current from a 2.7V to 5.5V input supply.
The output voltage is adjustable from 0.6V to VIN. With an
adjustable current limit, reverse current protection, pre-bias
start and over temperature protection the ISL8016 offers a
highly robust power solution. It uses current control
architecture to deliver fast transient response and excellent
loop stability.
The ISL8016 integrates a pair of low ON-resistance P-Channel
and N-Channel internal MOSFETs to maximize efficiency and
minimize external component count. 100% duty-cycle
operation allows less than 200mV dropout at 6A output
current. Adjustable frequency and synchronization allow the
ISL8016 to be used in applications requiring low noise.
Paralleling capability with phase interleaving allows the IC to
support >6A output current while offering reduced input and
output noise.
The ISL8016 can be configured for discontinuous or forced
continuous operation at light load. Forced continuous operation
reduces noise and RF interference while discontinuous mode
provides high efficiency by reducing switching losses at light
loads.
The ISL8016 is offered in a space saving 20 Ld 3x4 QFN lead
free package with exposed pad lead frames for excellent
thermal performance. The complete converter occupies less
than 0.15in2 area.
Various fixed output voltages are available upon request. See
Ordering Information on page 2 for more detail.
Features
• High Efficiency Synchronous Buck Regulator with up to 97%
Efficiency
• 1% Reference Accuracy Over-Temperature/Load/Line
• Fixed Output Voltage Option
• ±10% Output Voltage Margining
• Adjustable Current Limit
• Current Sharing Capable
• Start-up with Pre-Biased Output
• Internal Soft-Start - 1ms or Adjustable, Internal/External
Compensation
• Soft-Stop Output Discharge During Disabled
• Adjustable Frequency from 500kHz to 4MHz - Default at
1MHz
• External Synchronization up to 4MHz - Master to Slave Phase
Shifting Capability
• Peak current limiting, Hiccup Mode Short Circuit Protection
and Over-Temperature Protection‘
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
• Li-ion Battery Powered Devices
100
95
90
3.3VOUT PFM
85
3.3VOUT PWM
80
75
70
0.0
1.0
2.0
3.0
4.0
5.0
6.0
IOUT (A)
FIGURE 1. EFFICIENCY T = +25°C VIN = 5V
FN7616 Rev 1.00
May 5, 2011
Page 1 of 22
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