Datasheet > ISL78322

ISL78322

更新时间： 2024-10-03 01:18:19

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
17页	1242K
描述
Dual 2A/1.7A, 2.25MHz High-Efficiency, Synchronous Buck Regulator

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ISL78322 数据手册

DATASHEET

ISL78322

FN7908

Rev 3.00

November 30, 2016

Dual 2A/1.7A, 2.25MHz High-Efficiency, Synchronous Buck Regulator

The ISL78322 is a high-efficiency, dual synchronous step-down

Features

DC/DC regulator that can deliver up to 2A/1.7A continuous

• Dual 2A/1.7A high-efficiency, synchronous buck regulator

with up to 97% efficiency

output current per channel. The channels are 180° out-of-

phase for input RMS current and EMI reduction. The supply

voltage range of 2.8V to 5.5V allows for 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 ISL78322 operates at 2.25MHz

switching frequency, which allows for the use of small, low cost

inductors and capacitors. Each channel is optimized for

generating an output voltage as low as 0.6V.

• 2.8V to 5.5V input supply range

• 180° out-of-phase outputs reduce ripple current and EMI

• Start-up with prebiased output prevents negative current

flow in output stage

• External synchronization up to 8MHz

• Negative current detection and protection

• 100% maximum duty cycle for lowest dropout

• Internal current mode compensation

The ISL78322 has a forced PWM mode that reduces noise and

RF interference.

• Peak current limiting, hiccup mode short-circuit protection,

and over-temperature protection

The ISL78322 offers a 1ms Power-Good (PG) signal to monitor

both outputs at power-up. When shut down, ISL78322

discharges the output capacitors. Other features include

internal digital soft-start, enable for power sequence,

• Pb-free (RoHs compliant)

• AEC-Q100 qualified component

overcurrent protection, and thermal shutdown. The ISL78322

is offered in a 4mmx3mm, 12 Lead DFN package with 1mm

maximum height. The complete converter occupies less than

Applications

• DC/DC POL modules

1.8cm area.

• µC/µP, FPGA, and DSP power

• Automotive embedded processor power supply systems

The ISL78322 is qualified to AEC-Q100 and specified for

operation across the -40°C to +105°C (grade 2) ambient

temperature range.

Related Literature

• For a full list of related documents, visit our website

- ISL78322 product page

100

2.5V

PWM

OUT1

3.3V

PWM

OUT2

2.25MHz 5V AT +25°C

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

OUTPUT LOAD (A)

FIGURE 1. CHARACTERISTIC CURVE

FN7908 Rev 3.00

November 30, 2016

Page 1 of 17

12 3 4 5 6 7...17

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ISL78419ARZ-T	INTERSIL	获取价格	Integrated Automotive TFT-LCD Power Supply Regulator
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