ZL1505_10 INTERSIL [Intersil Corporation], ZL1505_10 Datasheet

ZL1505_10

Manufacturer Part Number

ZL1505_10

Description

Synchronous Step-Down MOSFET Drivers

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.ZL1505_10.pdf (13 pages)

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Synchronous Step-Down MOSFET Drivers

ZL1505

The ZL1505 is an integrated high-speed, high-current

N-channel MOSFET driver for synchronous step-down

DC/DC conversion applications. When used with Zilker

Labs Digital-DC™ PWM controllers, the ZL1505 enables

dynamically adaptive dead-time control that optimizes

efficiency under all operating conditions. A dual input

PWM configuration enables this efficiency optimization

while minimizing complexity within the driver.

Operating from a 4.5V to 7.5V input, the ZL1505

combines a 5A, 0.5W low-side driver and a 3A, 0.8W

high-side driver to support high step-down buck

applications. A unique adjustable gate drive current

scheme allows the user to adjust the drive current on

both drivers to optimize performance for a wide rage of

input/output voltages, load currents, power MOSFETs

and switching frequencies up to 1.4MHz. An integrated

30V bootstrap Schottky diode is used to charge the

external bootstrap capacitor. An internal watchdog circuit

prevents excessive shoot-through currents and protects

the external MOSFET switches.

The ZL1505 is specified over a wide -40°C to +125°C

junction temperature range and is available in an

exposed pad DFN-10 package.

November 12, 2010

FN6845.2

PWMH

1-888-INTERSIL or 1-888-468-3774

PWML

VDD

FIGURE 1. ZL1505 BLOCK DIAGRAM

Level

shift

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

ZL1505

Protection

through

Shoot-

Features

• High-speed, high-current drivers for synchronous

• Adaptive dead-time control optimizes efficiency

• Integrated 30V bootstrap Schottky diode

• Capable of driving 40A per phase

• Supports switching frequency up to 1.4MHz

• Adjustable gate drive strength optimizes efficiency

• Internal non-overlap watchdog prevents

Applications*

• High efficiency, high-current DC/DC buck converters

• Multi-phase digital DC/DC converters with phase

• Power train modules

• Synchronous rectification for secondary side isolated

Related Literature*

•

N-channel MOSFETs

when used with Digital-DC controllers

- >4A source, >5A sink low-side driver

- >3A source/sink high-side driver

- <10ns rise/fall times, low propagation delay

for different V

combinations

shoot-through currents

with digital control and PMBus™

adding/dropping

power converters

FN6846

with Current Sharing

All other trademarks mentioned are the property of their respective owners.

GND

VDD

ZL2004 Adaptive Digital DC/DC Controller

HSEL

LSEL

, V

OUT

(see page 12)

, I

OUT

BST

, F

(see page 12)

and MOSFET

Related parts for ZL1505_10

ZL1505_10 Summary of contents

Page 1

Synchronous Step-Down MOSFET Drivers ZL1505 The ZL1505 is an integrated high-speed, high-current N-channel MOSFET driver for synchronous step-down DC/DC conversion applications. When used with Zilker Labs Digital-DC™ PWM controllers, the ZL1505 enables dynamically adaptive dead-time control that optimizes efficiency under ...

Page 2

Typical Application Circuit The following application circuit represents the typical implementation of the ZL1505 (Notes 1, 2). VMON PWMH ZL2004 PWML XTEMP SGND ISENA ISENB FIGURE 2. POWER TRAIN MODULE USING ZL2004 PWM CONTROLLER NOTES: 1. For V of 4.5V ...

Page 3

Pin Configuration Pin Descriptions PIN NUMBER PIN NAME TYPE (Note 3) 1 HSEL PWMH 5 PWML 6 LSEL 7 GND VDD 10 BST ePad GND NOTE Input ...

Page 4

Absolute Maximum Ratings Voltage Measured with Respect to GND DC Supply Voltage for VDD Pin . . . . . . . . . . . . . -0. High-Side Supply Voltage for BST Pin . . . ...

Page 5

Electrical Specifications V T -40°C to +125°C. (Continued) PARAMETER THERMAL PROTECTION Thermal Trip Point Thermal Reset Point UPPER GATE DRIVER CHARACTERISTICS Driver Voltage (V – BST SW High-side Driver Peak Gate Drive Current (Pull-up) High-side Driver Peak Gate ...

Page 6

Electrical Specifications V T -40°C to +125°C. (Continued) PARAMETER GH fall time rise time fall time turn-on propagation delay, t DHR GH turn-off propagation delay, t DHF GL turn-on propagation delay, ...

Page 7

Typical Performance Curves 130 120 110 100 4.5 5 5.5 6 6.5 VDD (V) FIGURE 4. IVDD vs VDD WITH TEMPERATURE (NO SWITCHING) 22 CGH=0 20 CGH=3nF, HSEL=BST CGH=3nF, HSEL= 4.5 ...

Page 8

Typical Performance Curves 4.5 5 5.5 6 6.5 VDD (V) FIGURE 8. MINIMUM PWMH ON-TIME 6.6 5.6 4.6 3.6 2.6 1.6 0.6 4.5 5 5.5 6 6.5 ...

Page 9

Typical Performance Curves 4.5 5 5.5 6 6.5 VDD (V) FIGURE 14. LOW-SIDE DRIVER RISE TIME 3nF +25° ...

Page 10

Typical Performance Curves 4.5 5 5.5 6 6.5 VDD (V) FIGURE 20. HIGH-SIDE DRIVER PULL-DOWN CURRENT ( +25°C) A 17.5 15.5 13.5 11.5 9.5 7.5 5.5 3.5 4.5 ...

Page 11

ZL1505 Overview Theory of Operation The ZL1505 is a synchronous N-channel MOSFET driver that is intended for use with Zilker Labs Digital-DC PWM controllers to enable a high-efficiency DC/DC conversion scheme. The patented Digital-DC control scheme utilizes a closed-loop algorithm ...

Page 12

Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE REVISION 10/19/10 FN6845.2 “PWM Input Logic Low, ...

Page 13

Package Outline Drawing L10.3x3D 10 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE Rev 1, 3/10 3.00 B 3.00 TOP VIEW ( 2.30 ) (2.80 .50 ) TYPICAL RECOMMENDED LAND PATTERN 13 ZL1505 6 A PIN 1 INDEX AREA ...

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