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| MITSUMI Regulator+Reset IC MM1437 Regulator+Reset IC Monolithic IC MM1437 Outline This IC combines a low saturation 5V regulator, adapted for low power consumption, and a reset function (regulator output monitoring), for which there is significant market need, that uses the built-in 4.2V detection delay circuit. Features 1. Small input/output voltage difference 0.25V typ. 2. High input voltage 18V max. 3. Internal thermal shutdown circuit. 4. Internal current-limiting circuit. 5. Adjustment-free reset detection voltage 4.2V typ. 6. Easy to set delay time from voltage detection to reset release. Package SOP-7 SIP-5 Applications TV, monitors, air conditioners, others. Pin Assignment 1 7 6 5 2 3 4 1 2 3 4 5 6 SOP-7 7 GND --------------------------------------------------------------------------------------- RESET Cd VIN VOUT GND N.C ___ 1 2 1 2 3 SIP-5 4 5 3 4 5 RESET Cd VIN VOUT GND MITSUMI Regulator+Reset IC MM1437 Equivalent Circuit Diagram Pin Description Pin No. 1 (SOP-7) 5 (SIP-5) Pin name GND ------------------------------------------------------------------------------ Functions GND pin Output pin voltage detection output VOUT pin voltage detection output pin RESET pin logic - - - ------------------------------------------------------------------------------ Equivalent circuit diagram 2 (SOP-7) RESET 1 (SIP-5) RESET VOUT 3 (SOP-7) 2 (SIP-5) Cd Delay time capacitor pin ------------------------------------------------------------------------------ RESET pin output delay time can be set by the capacitance connected to the Cd pin. tPLH= 100000 * C tPLH: transmission delay time [S] C: capacitor value [F] 4 (SOP-7) 3 (SIP-5) 5 (SOP-7) 4 (SIP-5) 6 (SOP-7) 7 (SOP-7) VIN VOUT GND N.C Voltage supply input pin Regulator output pin GND pin MITSUMI Regulator+Reset IC MM1437 Absolute Maximum Ratings Item Operating temperature Storage temperature Supply voltage Output current Power dissipation Note: Symbol TOPR TSTG VCC IOUT Pd Ratings -20~+85 -40~+125 -0.3~+18 200 650* Unit C C V mA mW * When mounted on a 55 20 mm paper phenol board (SOP-7) When mounted on a 45 45 mm paper phenol board (SIP-5) Recommended Operating Conditions Item Operating temperature Output current Operating voltage Symbol TOP IOP VOP Ratings -20~+85 0~150 2~16 Unit C mA V Electrical Characteristics Item No-load input current 1 No-load input current 2 Regulator Output voltage Input-output differential voltage Line regulation Load regulation Vo temperature coefficient (Except where noted otherwise, Ta=25C) Measurement conditions VIN=6V IOUT=0mA VIN=4V IOUT=0mA VIN=6V IOUT=30mA VIN=4.8V IOUT=150 mA VIN=6V~10V IOUT=30mA VIN=6V IOUT=0~150mA Tj=-20~+85C VIN=6V IOUT=30mA VIN=6V f=120Hz VRIPPLE=1VP-P, IOUT=30mA VIN=6V, f=20~80kHz IOUT=30mA VIN=H L Tj=-20~+85C VOUT=H L H 25 5 VOUT=3.9V Cd=0.1F Cd=0.1F VOL=0.4V 4.03 50 4.90 Min. Typ. Max. Unit 400 2.5 5.00 0.25 10 40 100 60 200 4.2 100 50 100 10 30 0.65 100 200 15 90 0.85 400 4.37 5.10 0.50 30 80 800 A mA V V mV mV ppm/C dB Vrms V ppm/C mV mV mS S V Symbol Iccq1 Iccq2 VOUT Vi0 V1 V2 VOUT/ T RR *1 *1 *1 Ripple rejection Output noise voltage Reset Detecting voltage Vn VS VS/ T VS VOL tPLH tPHL VOPL Vs temperature coefficient *1 Hysteresis voltage Low-level output voltage RESET delay time "L" transmission delay time *1 Threshold operating voltage Note 1: design guaranteed ------------------------------------------------------------------------------- MITSUMI Regulator+Reset IC MM1437 Measuring Circuit Application Circuit Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for stability. Note 2 : RESET-terminal with a built-in pull-up resistance (10k). ----------------------------------------------------------- MITSUMI Regulator+Reset IC MM1437 Timing Chart VIN 10V 5V 0V VOUT 5V VS VS 0V RESET 5V tPLH 0V tPLH MITSUMI Regulator+Reset IC MM1437 Characteristics Detection voltage (IOUT=0mA) Output voltage (V) 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 RESET VOUT Quiescent current (IOUT=0mA) Quiescent current (mA) 3 2.5 2 1.5 1 0.5 0 0 2 4 6 8 10 12 14 16 Input Voltage (V) Input Voltage (V) Line regulation Line regulation (mV) 30 20 10 0 -10 -20 -30 4 6 8 10 12 14 16 Load regulation Load regulation (mV) 60 40 20 0 -20 -40 -60 0 50 100 150 Input voltage (V) Output current (mA) Ripple rejection 100 90 80 70 60 50 40 30 20 10 0 10 100 1000 10000 100000 Current limit Output voltage (V) 6 5 4 3 2 1 0 0 50 100 150 200 250 300 Ripple rejection (dB) Frequency (HZ) Output current (mA) RESET delay time 100 Allowable loss 800 700 600 500 400 300 200 100 0 -25 0 On board 55 22mm (SOP)/45 45mm (SIP) 10 1 0.01 0.1 1 Allowable loss (mW) Deyal time (mS) 25 50 75 100 125 Cd-capacitor (F) Temperature (C) |
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