ISL6443A 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

ISL6443A

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300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

Datasheets,
Related Docs
& Simulations

Ordering Information

iBuy direct from Intersil	iBuy direct - out of stock	Request samples
Check distributor inventory	Available in RoHS/Pb-Free

Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

ISL6443AEVAL2Z

Active

Eval Board

N/A

ISL6443AIRZ

Active

Ind

28 Ld QFN

2.24

ISL6443AIRZ-TK

Active

Ind

28 Ld QFN T+R

2.25

ISL6443AIVZ

Active

Ind

28 Ld TSSOP

2.28

ISL6443AIVZ-TK

Active

Ind

28 Ld TSSOP T+R

2.29

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

The ISL6443A is a high-performance, triple-output controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized at 180° out of phase, thus reducing the RMS input current and ripple voltage.

The ISL6443A incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1SD1 and SD2).

A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point and the linear regulator output is greater than 75% of its setpoint. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.

Key Features

Wide Input Supply Voltage Range
- Variable 5.6V to 24V
- Fixed 4.5V to 5.6V
Three Independently Programmable Output Voltages
Switching Frequency 300kHz
Out of Phase PWM Controller Operation
- Reduces Required Input Capacitance and Power Supply Induced Loads
No External Current Sense Resistor
- Uses Lower MOSFET's r_DS(ON)
Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443As
Programmable Soft-Start
Extensive Circuit Protection Functions
- PGOOD
- UVLO
- Overcurrent
- Over-temperature
- Independent Shutdown for Both PWMs
Excellent Dynamic Response
- Voltage Feed-Forward with Current Mode Control
QFN Packages:
- QFN - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile
Pb-Free (RoHS Compliant)

Related Documentation

Datasheet(s):
300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

Evaluation Board(s):
Using the ISL6443AEVAL2Z Evaluation Board

Technical Homepage:
Broadband

Parametric Data


V_IN (min) (V)		4.5

V_IN (max) (V)		24

V_OUT1 (min) (V)		.8

V_OUT1 (max) (V)		24

V_OUT2 (V)		24

V_OUT3 (V)		Adj.

I_OUT1 (A)		10

I_OUT2 (A)		10

Applications

Power Supplies with Multiple Outputs
xDSL Modems/Routers
DSP, ASIC, and FPGA Power Supplies
Set-Top Boxes
Dual Output Supplies for DSP, Memory, Logic, μP Core and I/O
Telecom Systems

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