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MITSUMI
Driver IC for Vibrators MM1426
Driver IC for Vibrators
Monolithic IC MM1426
Outline
This IC was developed as a driver for vibrator motors, and has an output voltage set at 1.3V. The input voltage is monitored, and if a constant voltage is not input the output is turned off.
Features
1. Compact package for small mounting area. 2. In addition to output control through the input voltage, the IC can be turned on and off through the CONT pin. 3. Good ripple rejection. 4. Output currents of up to 150mA. 5. Operating voltage of up to 12V. 6. Output voltage is available in 0.1V steps from 1.2V to 2.0V.
Package
SOT-25A
Applications
Cellular phones, PHS, game, pagers.
Pin Assignment
1 5 4 2 3 1 2 3 4 5 SOT-25 (TOP VIEW) CONT GND N.C VOUT VIN
MITSUMI
Driver IC for Vibrators MM1426
Equivalent Circuit Diagram
Pin Description
Pin No. Pin name 1 CONT Functions Output voltage on/off-control pin VCONT L H Output OFF ON Equivalent circuit diagram
Connect cont-terminal with VIN, when it is not used. 2 3 4 5 GND N.C VOUT VIN Regulator Output pin Voltage-supply input pin Output voltage is not output when input voltage is less than input voltage detection value. Note that consumption current flows even when output voltage is OFF due to input voltage detection. Turn output OFF with the CONT pin in order to suppress consumption current completely. GND pin
MITSUMI
Driver IC for Vibrators MM1426
Absolute Maximum Ratings
Item Operating temperature Storage temperature Supply voltage Output current Power dissipation Symbol TOPR TSTG VCC IOUT Pd Ratings -20~+75 -40~+125 -0.3~+12 200 150 (Alone) Unit C C V mA mW
Recommended Operating Conditions
Item Operating temperature Output current Operating voltage Symbol TOPR IOP VOP Ratings -20~75 0~150 1.8~12 Unit C mA V
Electrical Characteristics
Item Output voltage No-Load input current Input current 1 (OFF) Input current 2 (OFF) Line regulation Load regulation Vo temperature coefficient
(Except where noted otherwise, Ta=25C) Measurement conditions VIN=3.5V Io=30mA VIN=3.5V Io=0mA VIN=1.8V VCONT=1.6V VIN=3.5V VCONT=0V VIN=3V~5V Io=30mA VIN=3.5V Io=0~100mA Tj=-20~+75C VIN=3.5V Io=30mA VIN=3.5V f=120Hz VRIPPLE=1VP-P, Io=30mA VIN=H L Io=30mA L Io=30mA 55 2.0 10 30 100 70 2.1 200 2.6 500 5 1.6 -0.3 10 VIN+0.3 0.4 2.8 2.2 Min. Typ. Max. Unit -3% VO 120 80 +3% 240 160 0.1 20 60 V A A A mV mV ppm/C dB V ppm/C V mV A V V
Symbol Vo Iccq1 Iccq2 Iccq3 V1 V2 Vo/ T RR VSL VSL/ T VSH Vonh ION H L
Ripple rejection VIN low detector voltage VIN low detector voltage temperature coefficient VIN high detector voltage High threshold voltage Cont terminal current High threshold voltage Low threshold voltage
Tj=-20~+75C VIN=H VIN=L VIN=H
H Io=30mA L, L H
VCONT=1.6V
MITSUMI
Driver IC for Vibrators MM1426
Measuring Circuit
Application Circuits
Note 1: This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for stability. Note 2: The cause of oscillation is due to set wiring and capacitance changes in capacitor caused by temperatures changes, so please take extra care in placing the wires.
Timing Chart
2.6V 2.1V
VIN
0V
H
CONT
L 1.3V 0V
VOUT
MITSUMI
Driver IC for Vibrators MM1426
Characteristics
Load regulation
Load regulation (mV)
60 40 20 0 -20 -40 -60 0 20 40 60 80 100 120 140
Line regulation
Line regulation (mV)
10 5 0 -5 -10 4 6 8 10 12
Output current (mA)
VIN (V)
Current limit
Output voltage (V)
1.5 1.25 1 0.75 0.5 0.25 0 0 100 200 300
Thermal shutdown
Output voltage (V)
2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 25 75 125 175
Output current (mA)
Temperature (C)
Allowable loss
800
Allowable loss (mW)
700 600 500 400 300 200 100 0 0 25 50 75 100 125
Alone
On Board 57x31x0.8mm
Temperature (C)

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