MITSUBISHI <Standard Linear IC> M6227XGP 5-PIN SOT-23 3V SYSTEM FIXED OUTPUT VOLTAGE DC-DC CONVERTER DESCRIPTION M6227XGP is an integrated circuit designed as fixed output voltage general purpose DC-DC converter. Integrating peripheral components in ultrasmall 5-pin SOT23 package allows for simplified external circuit and compact low cost design. This IC is applicable to portable equipments due to low circuit current 500uA(typ.) Especially this is most suitable for CD-ROM, and so on as converter from 5 to 3V system. PIN CONFIGURATION (TOP VIEW) COLLECTOR OUTPUT 1 GND 2 IN 3 5 CLM 4 Vcc FEATURES Outline 5P2X-A (SOT-23) Wide operation power supply voltage range -- 4V to 15V(Vcc=5V typ.) Low power consumption -- 500µA max.(Vcc=5V typ., at no load) Built-in oscillator without peripheral components (110KHz typ.) Built-in overcurrent protection circuit Ultrasmall 5-pin SOT23 package <TYPE NAME & OUTPUT VOLTAGE> APPLICATIONS CD-ROM, portable equipments, general electric products TYPE NAME OUTPUT VOLTAGE M62270GP M62271GP M62272GP M62273GP M62274GP M62275GP M62276GP 3.3V 3.0V 2.7V 2.4V 2.1V 1.8V 1.5V BLOCK DIAGRAM VCC CLM 4 3 CURRENT LIMIT CIRCUIT OP Amp PWM Comp IN 1 Collector 5 1.25V OSC. (110KHz) 2 GND ( 1 /3) Jan. 2000 MITSUBISHI <Standard Linear IC> M6227XGP 5-PIN SOT-23 3V SYSTEM FIXED OUTPUT VOLTAGE DC-DC CONVERTER ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted) Symbol Parameter Conditions Ratings Unit Vcc Supply Voltage 16 V Io Output Current 100 mA Pd Power Dissipation Ta=25C 200 mW Ta>25C 2.0 mW/C KTHETA Thermal Derating Ratio Topr Operating Ambient Temperature -20 to +85 C Tstg Storage Temperature -40 to +125 C ELECTRICAL CHARACTERISTICS (Ta=25C, Vcc=5V, unless otherwise noted) Block Symbol Vcc Icc Parameter Conditions Max 4.0 - 500 15 700 M62271GP 3.15 2.85 3.30 3.00 3.45 3.15 M62272GP 2.57 2.70 2.83 M62273GP M62274GP 2.28 2.40 2.52 V V 2.00 2.10 2.20 V M62275GP 1.71 1.80 1.89 V M62276GP 1.42 1.50 1.58 5 30 V mV - 100 300 µA 65 110 160 120 150 180 KHz mV Vcc = 12V, Vc = 12V -1 90 - 1 µA Io = 100mA - 1.2 2.0 V Supply Voltage No load Supply Current Error Amp. Vreg-L Iin Output Voltage REF Line Regulation Output TDUTY Maximum ON Duty Output Leakage Current ICL Vsat Vcc= 4 to 12V IN Input Current Oscillator fosc Oscillator Frequency CLM VTHCLM Current Limit Voltage Output Saturation Voltage Min Units Typ M62270GP Vo Limits Vcc - CLM ( 2 /3) V µA V V % Jan. 2000 MITSUBISHI <Standard Linear IC> M6227XGP 5-PIN SOT-23 3V SYSTEM FIXED OUTPUT VOLTAGE DC-DC CONVERTER 1. Application Circuit (3.3V Output DC-DC Converter; M62270GP) RCLM 0.1ohm VIN (5V) + 100µF 5 CLM 4 Vcc 1Kohm VOUT(3.3V,1A) 3 IN M62270 Collector 1 + 100µF 1Kohm GND 2 47µH Fig.1 Example of application circuit of M62270GP Current Limit Detction: When the voltage drop between 4pin and 5pin becomes 150mV or more, Current Limit Detection circuit starts to operate. In the example of application (fig.1), the current is limited to 1.5A. 2. THE EXPRESSION OF CIRCUIT CONSTANTS CONSTANTS TON TOFF (TON+TOFF)MAX TOFF(MIN) TON(MAX) L(MIN) Ipk RCLM • • • • EXPRESSIONS VO+VF VIN - VCE(sat) - VO 1 fosc fosc:110KHz(Vcc=5V) ( TON + TOFF ) / ( 1 + TON ) TOFF 1 fosc - TOFF ( VIN - VCE(sat) - VO ) TON(MAX) ∆Io ∆Io Io + 1 2 0.15 ∆VCLM:150mV(Vcc=5V) Ipk VF : Forward voltage drop of an external diode. Vsat : Output saturation voltage of an external switching transistor. ∆Io :Set to 1/3 to 1/5 of maximum output current Choose an external transistor, diode and inductor with peak current rating greater than "Ipk". ( 3 /3 ) Jan. 2000