1-1-3 DC/DC Converter ICs STA801M 2-Output Separate Excitation Step-down Switching Mode ■Features ■Lineup • 2 regulators combined in 1 package Output Voltage (V) Part Number • Compact inline package Ch1 Ch2(Select one output) 5 9.0 / 11.5 / 12.1 / 15.5 STA801M • Output current (0.5A × 2 outputs) • Output voltage of Ch2 selectable from 4 levels ■Absolute Maximum Ratings • Built-in flywheel diode (Schottky barrier diode) • Requires only 7 discrete components (2 outputs) Parameter DC Input Voltage • Internally-adjusted phase corrections and output voltages • Built-in reference oscillator (125kHz) - Enables to downsize a choke-coil due to IC's high oscillating frequency. (Compared with conventional Sanken devices) Power Dissipation Symbol Ratings VIN 43 Unit V PD1 6.7(With infinite heatsink) W PD2 1.6(Without heatsink, stand-alone operation) W Junction Temperature Tj +125 °C Storage Temperature Tstg –40 to +125 °C • Built-in overcurrent and thermal protection circuits • Built-in soft start circuits (Output ON/OFF available) ■Applications • For BS and CS antenna power supplies • For stabilization of the secondary stage of switching power supplies • Electronic equipment ■Recommended Operating Conditions Parameter Ratings Symbol min. max. Unit DC Input Voltage Range VIN Ch2 VOmax.+2 40 Output Current Range per Channel IO 0 0.5 A Tjop –20 +125 °C Operating Temperature Range V ■Electrical Characteristics (Ta=25°C) Ratings Parameter STA801M Symbol min. Output voltage 1 Ch1 Efficiency * Temperature Coefficient of Output Voltage Line Regulation Load Regulation Output voltage 2-1 Ch2 (Select one output) Output voltage 2-2 Output voltage 2-3 Output voltage 2-4 VO2-4 Efficiency* Temperature Coefficient of Output Voltage Line Regulation Load Regulation Common No-load Circuit Current Oscillation Frequency Overcurrent Protection Starting Current VO1 4.80 Conditions η1 V % ±0.5 30 Conditions mV/°C 90 mV VIN=10 to 30V, IO=0.3A ∆VOLOAD1 10 Conditions 40 mV VIN=20V, IO=0.1 to 0.4A 8.64 Conditions 9.00 9.36 V VIN=20V, IO=0.3A 11.04 Conditions 11.50 11.96 V VIN=20V, IO=0.3A 11.62 Conditions VO2-4 5.20 80 ∆VOLINE1 VO2-3 5.00 VIN=20V, IO=0.3A ∆VO/∆Ta1 VO2-2 max. VIN=20V, IO=0.3A Conditions VO2-1 Unit typ. 12.10 12.58 V VIN=20V, IO=0.3A 14.88 Conditions 15.50 16.12 V VIN=20V, IO=0.3A η 89 Conditions % VIN=20V, IO=0.3A ∆VO/∆Ta ±2.0 ∆VOLINE 40 Conditions mV/°C 130 mV VIN=20 to 30V, IO=0.3A ∆VOLOAD 30 Conditions 120 VIN=20V, IO=0.1 to 0.4A 15 mA f 125 kHZ IS1 0.51 0.7 * Efficiency indicates the value when only one channel is active. The value can be calculated as shown below. 7.5mA is deducted for the no-load circuit current of output. η= 58 VO•IO VIN•(IIN–0.0075) ICs × 100(%) mV ICC A Icc at unused 2 STA801M ■External Dimensions (SIP10 [STA 10Pin]) (Unit : mm) 9±0.2 3.15±0.5 (1) 4±0.2 (3.1) 1.15 +0.2 –0.1 2–(R0 .65) R-END 0.55+0.2 –0.1 1.2±0.1 2–(R1) 9×P2.54±0.5=22.86±1 Pin Assignment q VO2 Cont w VOS1 e SS1 r SWOUT1 t GND y VIN u SWOUT2 +0.2 0.55 –0.1 4.3±0.7 (Measured at the tip) (Measured at the tip) 25.25±0.3 C1.5±0.5 i SS2 o VOS2–2 !0 VOS2–1 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.5g 1 2 3 4 5 6 7 8 9 10 ■Block Diagram VIN 6 4 SWOUT1 P.Reg. OCP SS1 3 + PWM – PWM Logic Drive 2 VOS1 + Amp. – PWM OSC Vref TSD f/4 Reset 7 SWOUT2 OCP PWM Logic SS2 8 10 VOS2 –1 Drive + PWM – 9 VOS2 –2 VO2 Cont 1 + Amp. – GND 5 Vref ■Typical Connection Diagram STA800M 6 VIN + SWOUT1 VIN + STA801M 9 + Vo2 9v 10 7 STA801M + Vo2 11.5v 10 C2 + Ch 1 C4 330µF VOS1 1 12.1V Vo2Cont 1 15.5V Vo2Cont 2 0.47µ F 8 Open:ON Low :OFF 7 VO1 5V:100 µ H C1 220µF 3 SS1 Open:ON Low :OFF Selection of connection method and output for VOS2-1 and VOS2-2 of Channel 2 L1 4 SWOUT2 SS2 C5 + 0.47µ F VO2 Cont 1 GND 5 L2 7 VO2 150 µ H Ch 2 GND VOS2 –2 + VO2Cont Pin C3 330µF 10 Or Open Low 9V 11.5V 12.1V 15.5V VO2 Sensing Pin VOS2 –1 9 Pin 9 Pin 10 ■Ta-PD Characteristics 7 Power Dissipation PD (W) 6 With Infinite Heatsink 5 4 3 2 Without Heatsink 1 0 –30 0 25 50 75 100 125 Ambient Temperature Ta (°C) ICs 59