Featured Products Space-Saving Energy Efficient Secondary Power Supplies for Automotive Systems BD905xx Series Reduce external parts 80% 90% efficiency Light Load Mode utilized for greater energy savings Improved thermal design cuts loss by 90%* compared with LDOs External parts equivalent to 3-pin products for HTSOP-J8 *ROHM July 2013 survey Contributes to set miniaturization Feedback resistors, phase compensation, and other components are built in, making it easy to configure a DC/DC power supply using few external parts. In addition, the special heat dissipation design results in significantly increased space savings during mounting. Co nve n t i o n a l VIN VIN PVIN 20mm 20mm BD905xx Series Automotive-Grade Secondary Power Supply ICs (Actual Size) VOUT SW VIN PGND SS FB ITH MODE GND B D 9 05x x S e r i e s Part count reduced by 80% 15 RT External Parts: Lx1, Cx8, Rx6 piece PVIN VIN EN SW VOUT PGND FB GND MODE External Parts: Lx1, Cx2 3 piece Consi d e r a bly f ewe r ex t e r nal p a r t s High efficiency across the entire range 100 90 High efficiency even at light loads BD90535EFJ-C Light Load MODE 90% 80 EFFICIENCY [%] Synchronous rectification and Light Load Mode ensures high efficiency operation (90% max.) across the entire load range, providing the energy savings required for today’s automotive applications. 70 60 High efficiency with PWM mode PWM MODE 50 40 30 20 VIN=3.3V 10 0 0.01 0.10 1.00 LOAD CURRENT [A] External Dimensions Block Diagram EN 4.9±0.1 (MAX 5.25 include BURR) (3.2) PVIN PWM Comp. OCP R Driver Logic Synchronous rectification for high efficiency SW SLOPE OSC +6° 4° -4° 8 7 6 5 3.9±0.1 ERROR Amp. 1 S 2 3 4 1PIN MARK S SCP 1024cycle FB GND 0.08±0.08 UVLO /TSD 0.85±0.05 1.0MAX PGND OSC +0.05 0.17 -0.03 0.545 OVP 0.65±0.15 UVLO (2.4) SOFT START 1.05±0.2 VIN VREF 6.0±0.2 Phase compensation built in 1.27 +0.05 0.42-0.04 0.08 M 0.08 S (Unit : mm) MODE Switching Regulator Family General Purpose Boost, Buck, Boost/Buck Switching Regulators 1.75A/2A/4A General Purpose ICs Built-In FET Type Automotive Grade Secondary Power Supply ICs Switching Regulators External FET Type Multi-Output Switching Regulators Monolithic Power Supply Modules 2ch/1ch Easily configure high-power power supply circuits 2ch Step-Down DC/DC Controllers, 2ch Step-Up/Down/Negative Voltage DC/DC Controllers, 2ch Step-Down DC/DC Converters, 3ch Step-Down DC/DC Converters Ultra-Compact Monolithic Power Supply Modules Automotive-Grade Secondary Power Supply IC Lineup 1ch 3A Output No. of Outputs Supply Voltage (V) Output Current (A) BD90532EFJ-C 1 2.69 to 5.5 3.0 BD90535EFJ-C 1 2.69 to 5.5 BD90538EFJ-C 1 2.69 to 5.5 Part No. No. of Outputs Supply Voltage (V) Output Current (A) BD90522EFJ-C 1 2.69 to 5.5 2.0 BD90525EFJ-C 1 2.69 to 5.5 2.0 BD90528EFJ-C 1 2.69 to 5.5 Part No. No. of Outputs BD90571EFJ-C 1 Part No. 1ch 2A Output 1ch 1A Output Output Voltage Ref. Voltage (V) Accuracy (%) Op. Temp. (°C) Op. Freq. (kHz) Freq. Accuracy (%) Oscillator Package 1.2 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 3.0 1.5 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 3.0 1.8 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 Op. Temp. (°C) Op. Freq. (kHz) Freq. Accuracy (%) Oscillator Package 1.2 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 1.5 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 2.0 1.8 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 Supply Voltage (V) Output Current (A) Output Voltage (V) Ref. Voltage Accuracy (%) Op. Temp. (°C) Op. Freq. (kHz) Freq. Accuracy (%) Oscillator Package 2.69 to 5.5 1.0 1.2 ±2.0 −40 to +125 2250 ±20 Self-Oscillation HTSOP-J8 Output Voltage Ref. Voltage Accuracy (%) (V) The content specified in this document is correct as of July 1st, 2013. 56O6711E 07.2013 ROHM