LM4570_14 Datasheet, PDF (1/15 Pages) Texas Instruments – Single-Ended Input Motor Driver

LM4570
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SNOSAV2B – APRIL 2006 – REVISED JULY 2009
LM4570 Single-Ended Input Motor Driver
Check for Samples: LM4570
FEATURES
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•2 Output Short Circuit Protection
• High Output Current Capability
• Wide Output Voltage Range
• Fast Turn on Time
• Output Short Circuit Protection
• Low Power Shutdown Mode
• Minimum External Components
• Available in Space-Saving WSON Package
APPLICATIONS
• Mobile Phones
• PDAs
• Video Game Systems
KEY SPECIFICATIONS
• High Output Current @ V_DD = 3V: 192 mA
• Fast Turn On Time @ 3V: 2.4 ms
• Quiescent Power Supply Current @ 3V: 1.9 mA
• Shutdown Current: 0.1 µA (Typ)
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 shutdown mode minimizes power
consumption.
Thermal and output short circuit protection prevents
the device from being damaged during fault
conditions.
Typical Application
C_S
MOTOR
CONTROL SIGNAL
R_F
R_IN
C_REF1
0.1 PF
IN
REF2
REF1
V_DD
VO1
LM4570
VO2
ON
/SD
OFF
GND
Figure 1. Typical Motor Driver Application Circuit
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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