SM6702 Nippon Precision Circuits Inc, SM6702 Datasheet
SM6702
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SM6702 Summary of contents
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... NIPPON PRECISION CIRCUITS INC. OVERVIEW The SM6702 series are step-up DC/DC converter ICs, fabricated using NPC’s Molybdenum-gate CMOS pro- cess. They incorporate reference voltage source, error amplifier, oscillator, start-up circuit, PFM (Pulse Fre- quency Modulation) control circuit into a single chip. The only external components required are a Coil, Diode and output smoothing capacitors to form a step-up DC/DC converter. They employ PFM voltage control cir- cuits to achieve high effi ...
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... PACKAGE DIMENSIONS (Unit : mm) SM6702 −×× HA(SOT23 − 3) 2.9 ± 0.2 0.95 0.95 0.4 ± 0.1 0.2 M SM6702 series SM6702 −×× HB(SOT89 − Description Ground L X Switching pin Output (device supply pin) SM6702 −×× HB(SOT89 − 0.42 ± ...
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... BLOCK DIAGRAM OUT VREF SM6702 series PFM OSC START−UP VSS NIPPON PRECISION CIRCUITS—3 LX ...
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... oscillator frequency Switch ON duty cycle Duty Input voltage range Setting output voltage target SM6702 series Condition −×× −×× Condition = 30 k Ω Ω ...
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... V IN GND PFM Control In SM6702 series, the LX transistor ON interval is fixed, and the OFF interval varies in response to the input voltage and load changes. Thus the resulting switching cycle frequency varies, called pulse frequency modula- tion. SM6702 series and then instantly turned OFF, the energy stored in the coil L during ON across the coil ...
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... BASIC CIRCUIT V IN TYPICAL APPLICATION CIRCUIT + C1 C2 1.5V SM6702 series OUT VSS Coil (L) : 330 µH Diode (D) : MA721 (Matsushita Schottky diode) Capacitor ( µF tantalum OUT VSS Coil (L) : 330 µH Schottky Diode (D) Capacitor (C1 µF tantalum Capacitor (C2) : 0.22 µF ceramic Capacitor (C3 µF tantalum ...
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... Output Current I Ripple voltage vs. Output current L=330µH, C=22µF 200 175 150 125 100 V =1. =0. Output Current I out SM6702 series SM6702-30HA (V 3.5 V =1. 2.5 V =1. 1 [mA] out 100 =1. ...
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... L 1.0 0.8 0.6 0.4 0.2 0.0 -40 - Temperature [°C] Current consumption vs. Temperature V =1.5V, L=330µ -40 - Temperature [°C] SM6702 series Maximum oscillator frequency vs. Temperature =3kΩ L 200 175 150 125 100 Hold-on voltage vs. Temperature 1.0 0.8 0.6 0.4 0.2 0 Oscillator duty cycle vs. Temperature =30kΩ ...
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... LX switching current vs. Temperature V =2.9V out 200 175 150 125 100 -40 - Temperature [°C] SM6702 series LX leakage current vs. Temperature 100 =3.5V in out - Temperature [°C] NIPPON PRECISION CIRCUITS—9 ...
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... Customers shall not expor t, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. SM6702 series NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome ...