lm4570lqx National Semiconductor Corporation, lm4570lqx Datasheet

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lm4570lqx

Manufacturer Part Number
lm4570lqx
Description
Single-ended Input Motor Driver
Manufacturer
National Semiconductor Corporation
Datasheet
© 2006 National Semiconductor Corporation
LM4570
Single-Ended Input Motor Driver
General Description
The LM4570 is a single supply motor driver for improved
sensory experience in mobile phones and other handheld
devices. The LM4570 is capable of driving up to 192mA
while operating from a 3V supply. Near rail-to-rail output
swing under load ensures sufficient voltage drive for most
DC motors, while the differential output drive allows the
voltage polarity across the motor to be reversed quickly.
Reversing the voltage gives the LM4570 the ability to drive a
motor both clock-wise and counter clock-wise from a single
supply.
The LM4570 features fast turn on time, and a wide input
voltage range for precise speed control. A low power shut-
down mode minimizes power consumption.
Thermal and output short circuit protection prevents the
device from being damaged during fault conditions.
Typical Application
FIGURE 1. Typical Motor Driver Application Circuit
DS201863
Key Specifications
Features
n Output Short Circuit Protection
n High Output Current Capability
n Wide Output Voltage Range
n Fast Turn on Time
n Output Short Circuit Protection
n Low Power Shutdown Mode
n Minimum external components
n Available in space-saving LLP package
Applications
n Mobile Phones
n PDAs
n Video Game Systems
j
j
j
j
High Output Current
Fast Turn On Time
Quiescent Power Supply Current
Shutdown Current
@
@
3V
V
DD
= 3V
@
3V
20186326
www.national.com
0.1µA (typ)
July 2006
192mA
1.9mA
2.4ms

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lm4570lqx Summary of contents

Page 1

... Thermal and output short circuit protection prevents the device from being damaged during fault conditions. Typical Application FIGURE 1. Typical Motor Driver Application Circuit © 2006 National Semiconductor Corporation Key Specifications j High Output Current j Fast Turn On Time ...

Page 2

Connection Diagrams www.national.com Leadless Leadframe Package (LLP) LQ Package Top View Order Number LM4570LQ See NS Package Number LQB08A LLP Marking 20186327 Top View X - One digit date code TT - Lot traceability G - Boomer Family C8 - ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Note 1) Storage Temperature Voltage at Any Input Pin Power Dissipation (Note 3) ESD Susceptibility (Note 4) ...

Page 4

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, ...

Page 5

Typical Performance Characteristics Output Low Voltage vs Load Current Output High Voltage vs Load Current Output Voltage vs Input Voltage 20Ω Output Low Voltage vs ...

Page 6

Typical Performance Characteristics Output Voltage vs Input Voltage 20Ω Power Dissipation vs Supply Voltage Slew Rate vs Supply Voltage R = 30Ω L www.national.com (Continued) Output Voltage vs Input Voltage V 20186316 Supply ...

Page 7

Typical Performance Characteristics Output Transition High to Low, Low to High V = 3V, 1V/div, 400ns/div DD Turn-Off Time V = 5V, 2V/div, 1ms/div DD (Continued) Output Transition High to Low, Low to High V DD 20186306 V DD 20186308 ...

Page 8

Application Information BRIDGE CONFIGURATION EXPLANATION The LM4570 uses a bridged architecture that drives a load differentially. The BTL design offers several advantages over a single-ended design. The the device outputs both source and sink current, which means ...

Page 9

Application Information GAIN SETTING The resistors R and R set the gain of the LM4570, given Where A is the differential gain ended gain ...

Page 10

Application Information DEMO BOARD LAYOUT www.national.com (Continued) 10 20186324 ...

Page 11

Revision History Rev 1.0 Date 04/13/06 11 Description Initial release. www.national.com ...

Page 12

Physical Dimensions inches (millimeters) unless otherwise noted National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and ...

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