M5291P/FP DC/DC Converter REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Description M5291 is a semiconductor integrated circuit which is designed for switching regulator control. The device consists of a comparator, controlled pulse width oscillator (with peak current protection circuit), temperature compensated reference, and high current output switch. Especially, this IC was designed for Step-Down and Step-Up and Voltage-Inverting applications. Features • Wide supply voltage range: 2.5 to 40 V • Low dissipation current: 1.4 mA • Wide range of output Voltage adjust: 1.17 to 40 V • Output switch current: 200 mA • Wide range of switching frequency: 100 Hz to 100 kHz • Built-in peak current protection circuit Application General power supply system Block Diagram Switch collector 1 8 Driver Q S R Switch emitter 2 7 Peak current sense Oscillator Timing capacitor 3 Comparator 1.17 V Reference Ground 4 REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 1 of 9 6 VCC + − 5 Comparator input M5291P/FP Pin Arrangement M5291P/FP Switch collector 1 8 Driver Switch emitter 2 7 Peak current sense Timing capacitor 3 6 VCC Ground 4 5 Comparator input (Top view) Outline: PRDP0008AA-A (8P4) [P] PRSP0008DE-C [FP] (recommend) PRSP0008DA-A (8P2S-A) [FP] (not recommend for new design) REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 2 of 9 M5291P/FP Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted) Item Power supply voltage Symbol VCC Ratings 40 Unit V Input voltage Switch collector voltage VIN VC (S) −0.3 to 40 40 V V Switch emitter voltage VE (S) 40 V Collector emitter voltage Driver collector voltage VCE (S) VC (D) 40 40 V V Switch current Internal power dissipation ISW Pd 200 625 mA mW Thermal derating Kθ 440 6.25 mW/°C Operating ambient temperature Topr 4.5 −20 to +75 Storage temperature Tstg −55 to +125 Conditions Comparator input 8-pin DIP 8-pin FLAT 8-pin DIP 8-pin FLAT °C °C Electrical Characteristics (Ta = 25°C, VCC = 5 V) Item Oscillator Output Comparator Circuit current Symbol Limits Typ Max Unit 20 150 35 200 50 250 µA µA VOSC ID/IC 0.6 6 VP-P Current protection, detecting voltage Saturation voltage VIPK 270 330 390 mV Vsat1 1.5 2.0 V Darlington connection ISW = 50 mA Saturation voltage Vsat2 0.3 0.6 V ISW = 50 mA IC (D) = 10 mA Collector leak current Threshold voltage IL VTH 1.11 10 1.17 1.23 nA V VCE = 40 V Threshold voltage regulation Input bias current VTHREG 0.03 0.2 mV/V IB 40 200 nA ICC 1.4 2.5 mA Charge current Discharge current IC ID Oscillator voltage Charge, discharge current ratio REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 3 of 9 Min Test Conditions 3.0 ≤ VCC ≤ 40 V VIN = 0 V M5291P/FP Application Circuits 1. Step-up Circuit L VIN = 5 V VOUT = 12 V IO = 20 mA f = 50 kHz 510 µH 1 8 Q R3 240 Ω S R 2 7 Oscillator RSC 3Ω D Comparator 3 CT − 4 + + + 1.17 V 820 pF VOUT 12 V/20 mA 6 VIN 5V CIN 100 µF 5 COUT 100 µF R1 9.1 kΩ R2 1 kΩ 2. Step-up Circuit with Transistor L VIN = 5 V VOUT = 12 V IO = 1 A f = 50 kHz 10 µH 1 8 Q R3 1 kΩ S R NPN Tr 2 7 R4 Oscillator RSC 60 mΩ 680 Ω D CT 820 pF 3 Comparator 6 + 1.17 V − 4 VOUT 12 V/1 A + COUT 100 µF REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 4 of 9 + CIN 100 µF 5 R1 9.1 kΩ VIN 5V R2 1 kΩ M5291P/FP 3. Step-down Circuit VIN = 24 V VOUT = 5 V IO = 0.1 A f = 50 kHz 1 8 Q R3 1.2 kΩ S R 2 7 D Oscillator CT 3 Comparator 330 pF + + − 4 VOUT 5 V/0.1 A 6 + 1.17 V L 440 µH RSC 2Ω VIN 24 V CIN 100 µF 5 COUT 100 µF R1 3.6 kΩ R2 1.2 kΩ 4. Step-down Circuit with Transistor VIN = 24 V VOUT = 5 V IO = 1 A f = 50 kHz R3 100 Ω PNP Tr 1 8 R4 300 Ω Q S R D 2 7 Oscillator L 47 µH CT 330 pF 3 Comparator RSC 0.16 Ω 6 + 1.17 V + CIN VIN 24 V − 4 VOUT 5 V/1 A + COUT 100 µF REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 5 of 9 5 R1 3.6 kΩ R2 1.2 kΩ M5291P/FP 5. Inverse Polarity Circuit VIN = 5 V VOUT = −5 V IO = 40 mA f = 50 kHz 1 8 Q S R L 2 7 Oscillator 260 µH 3 RSC 1.5 Ω Comparator CT 820 pF − 4 + + + 1.17 V D VOUT −5 V/40 mA 6 VIN 5V CIN 100 µF 5 R1 1 kΩ COUT 100 µF R2 3.3 kΩ 6. Inverse Polarity Circuit with Transistor VIN = 5 V VOUT = −12 V IO = 1 A f = 50 kHz R3 100 Ω PNP Tr 1 8 R4 24 Ω Q S R L 20 µH 2 7 Oscillator 3 CT 820 pF Comparator − 4 + COUT 220 µF REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 6 of 9 6 + 1.17 V D VOUT −12 V/1 A RSC 0.1 Ω + CIN 100 µF 5 R1 2.4 kΩ VIN 5V R2 22 kΩ M5291P/FP Constant Definition Constant Step-down Circuit Step-up Circuit Inverse Polarity Circuit VOUT + VF VOUT + VF VIN (MIN) − Vsat −VOUT VOUT + VF − VIN (MIN) VIN (MIN) − Vsat 1 1 fMIN TON + TOFF TON 1+ TOFF 1 − TOFF fMIN fMIN TON + TOFF TON 1+ TOFF 1 − TOFF fMIN VIN − Vsat 1 fMIN TON + TOFF TON 1+ TOFF 1 − TOFF fMIN CT 6 × 10−5 • TON 6 × 10−5 • TON 6 × 10−5 • TON IPK 2 • IOUT (MAX) TON TOFF (TON + TOFF) MAX TOFF TON L (MIN) RSC VO Note: ( VIN (MIN) − Vsat − VOUT ) • TON (MAX) IPK 0.33 IPK 1.17 × (1 + 2 • IOUT (MAX) • ( 1 + ( VIN (MIN) − Vsat IPK TON ) TOFF ) • TON (MAX) 0.33 IPK R1 ) R2 1.17 × (1 + 2 • IOUT (MAX) • ( 1 + ( VIN (MIN) − Vsat IPK TON TOFF ) ) • TON (MAX) 0.33 IPK R1 ) R2 1.17 × (1 + R1 ) R2 VF: Forward Voltage of Diode Vsat: Output saturation voltage of M5291 (0.6 Vmax at single output, 2.0 Vmax at Darlington output) Setting switching frequency first and calculate each constant value. Notes: 1. Peak current sense In overcurrent function, oscillator is stop, when voltage descend of external detecting resistance is more than 330 mV. 2. ON/OFF Control If you need stop the action, connected resistance (5 to 10 kΩ) between supply voltage terminal and timing capacitor terminal. TON 3. is not established more than 0.857, because charge and discharge current ratio fixed 1 : 6. TON + TOFF REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 7 of 9 M5291P/FP Package Dimensions RENESAS Code PRDP0008AA-A 5 1 4 MASS[Typ.] 0.5g c *1 E 8 Previous Code 8P4 e1 JEITA Package Code P-DIP8-6.3x8.84-2.54 NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. *2 D e1 D E A A1 A2 bp b2 b3 c L A1 A A2 Reference Symbol SEATING PLANE *3 b 3 *3 b 2 bp e e L JEITA Package Code P-SOP8-4.4x4.85-1.27 RENESAS Code PRSP0008DE-C *1 Previous Code — Min Nom Max 7.32 7.62 7.92 8.7 8.9 9.1 6.15 6.3 6.45 4.5 0.51 3.3 0.4 0.5 0.6 0.9 1.0 1.3 1.4 1.5 1.8 0.22 0.27 0.34 15° 0° 2.29 2.54 2.79 3.0 MASS[Typ.] 0.1g F D 8 Dimension in Millimeters NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. 5 c *2 E HE bp Index mark Terminal cross section ( Ni/Pd/Au plating ) Z Reference Symbol 4 1 e *3 bp x M A A2 L1 A1 θ L y Detail F REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 8 of 9 D E A2 A1 A bp b1 c c1 θ HE e x y Z L L1 Dimension in Millimeters Min Nom Max 4.65 4.85 5.05 4.2 4.4 4.6 1.85 0.00 0.1 0.20 2.03 0.34 0.4 0.46 0.15 0.20 0.25 0° 8° 5.7 6.2 6.5 1.12 1.27 1.42 0.12 0.10 0.75 0.25 0.45 0.65 0.90 M5291P/FP JEITA Package Code P-SOP8-4.4x5-1.27 RENESAS Code PRSP0008DA-A MASS[Typ.] 0.07g E 5 *1 HE 8 Previous Code 8P2S-A F 1 NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. 4 Index mark c A2 *2 A1 D L A Reference Symbol *3 e bp y D E A2 A1 A bp c Detail F HE e y L REJ03D0841-0300 Rev.3.00 Jun 15, 2007 Page 9 of 9 Dimension in Millimeters Min Nom Max 4.8 5.0 5.2 4.2 4.4 4.6 1.5 0.05 1.9 0.35 0.4 0.5 0.13 0.15 0.2 0° 10° 5.9 6.2 6.5 1.12 1.27 1.42 0.1 0.2 0.4 0.6 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Notes: 1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of Renesas or any third party with respect to the information in this document. 2. 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