1-1-4 Linear Regulator ICs SI-3000KS Series Surface-Mount, Low Current Consumption, Low Dropout Voltage ■Features ■Absolute Maximum Ratings • Compact surface-mount package (SOP8) Parameter • Compatible with low ESR capacitor • Low circuit current at output OFF Iq ≤ 350 µA (IO = 0 A, VC = 2 V) • Low current consumption Iq (OFF) ≤ 1 µA (VC = 0 V) Unit VIN*1 17 V VC VIN V DC Output Current IO*1 1.0 A Power Dissipation PD*1, *2 0.76 W Junction Temperature Tj –40 to +125 °C Storage Temperature Tstg –40 to +125 °C Thermal Resistance (Junction to Ambient Air) θ j-a θ j-L 130 °C/W 22 °C/W Thermal resistance (Junction to Lead (pin 7)) • Low dropout voltage VDIF ≤ 0.6 V (IO = 1 A) Ratings Output Control Terminal Voltage DC Input Voltage • Output current: 1.0 A (Ta=25°C) Symbol *1: VIN (max) and IO (max) are restricted by the relation PD = (VIN - VO) × IO. Please calculate these values referring to the Copper laminate area vs. Power dissipation data as shown hereinafter. *2: When mounted on a glass epoxy board of 1600 mm2 (copper laminate area 2%). • 3 types of output voltages (2.5 V, 3.3 V, and variable type) available • Output ON/OFF control terminal voltage compatible with LS-TTL • Built-in drooping-type-overcurrent and thermal protection circuits ■Applications • Local power supplies • Battery-driven electronic equipment ■Electrical Characteristics (Ta=25°C, Vc=2 V, unless otherwise specified) Ratings Parameter Symbol SI-3012KS (variable type) min. Input Voltage Output Voltage (Reference voltage VADJ for SI-3012KS) VIN 2.4 VO (VADJ) 1.24 Conditions max. min. 1.28 1.32 2.45 Load Regulation Quiescent Circuit Current Circuit Current at Output OFF Temperature Coefficient of Output Voltage Ripple Rejection Overcurrent Protection Starting Current*2 VC Terminal min. 2.50 2.55 3.234 VIN=3.3V, IO=10mA 0.3 Conditions Conditions Conditions 10 VIN=5V, IO=0 to 1A 350 VIN=3.3V, IO=0A, VC=2V 1 VIN=5V, IO=0A, VC=2V 1 1 VIN=3.3V, VC=0V VIN=5V, VC=0V ±0.3 ±0.3 Tj=0 to 100°C (VO=2.5V) Tj=0 to 100°C Tj =0 to 100°C 55 55 55 VIN =3.3V, f=100 to 120HZ (VO=2.5V) VIN=3.3V, f=100 to 120HZ VIN=5V, f=100 to 120HZ RREJ IS1 50 350 VIN=3.3V, VC=0V Conditions Conditions 15 VIN=5 to 10V, IO=10mA VIN=3.3V, IO=0 to 1A VIN=3.3V, IO=0A, VC=2V, R2=24kΩ ∆VO/∆Ta 0.6 40 350 1.2 Conditions ±0.3 1.2 Control Voltage (Output OFF) VC, IL 0.8 0.8 0.8 IC, IH 40 40 40 Control Current (Output ON) Control Current (Output OFF) IC, IL Conditions 2.0 VC=2V Conditions –5 0 –5 0 –5 0 VC=0V *1: Refer to the Dropout Voltage parameter. *2: The Is1 is specified at the 5% drop point of output voltage VO on the condition that VIN = VO + 1 V, and IO = 10 mA. *3: Output is OFF when the output control terminal VC is open. Each input level is equivalent to LS-TTL level. Therefore, the device can be driven directly by LS-TTLs. 70 ICs mV µA µA A VIN=5V VC, IH 2.0 mV dB Control Voltage (Output ON)*3 2.0 V mV/ °C 1.2 VIN=3.3V VIN=3.3V (VO=2.5V) V IO=1A 10 VIN=3.3V, IO=0 to 1A (VO=2.5V) Conditions V IO=0.5A VIN=3.3 to 8V, IO=10mA 40 Iq (OFF) 3.366 0.4 IO=1A VIN=3.3 to 8V, IO=10mA (VO=2.5V) Iq 3.300 0.6 IO=1A (VO=2.5V) ∆VOLOAD max. VIN=5V, IO=10mA IO=0.5A 0.6 ∆VOLINE typ. 0.4 IO=0.5A (VO=2.5V) Conditions Line Regulation max. *1 VIN=3.3V, IO=10mA Conditions Unit SI-3033KS typ. *1 VDIF Dropout Voltage SI-3025KS typ. V µA µA SI-3000KS Series ■External Dimensions (SOP8) (Unit : mm) ±0.4 5.1 1.27 5 1 2 3 4 0.5±0.1 6 6.2±0.3 7 4.4±0.2 8 Pin Assignment q VC w VIN e VO r Sence (ADJ for SI-3012KS) t GND y GND u GND i GND 0.15+0.1 –0.05 0.4±0.1 10 ° 1.27 0.10 0.4±0.1 0.12 M 1.55±0.15 Plastic Mold Package Type Flammability: UL 94V-0 Product Mass: Approx. 0.1 g 0.05±0.05 1.5±0.1 0 to 0.995max. ■Block Diagram ●SI-3012KS ●SI-3025KS, SI-3033KS VIN 2 3 VO VIN 2 VC 1 4 ADJ VC 1 3 VO 4 Sense TSD - TSD - + + 8 8 7 7 6 REF 6 REF 5 GND 5 GND ■Typical Connection Diagram ●SI-3012KS ●SI-3025KS, SI-3033KS VIN 2 VO 3 R1 VC GND ADJ 1 4 5 to 8 CIN VIN 2 CO Load CIN VO 3 sense VC GND 4 1 5 to 8 CO Load R2 R2 R1, R2: Output voltage setting resistors The output voltage can be set by connecting R1 and R2 as shown above. The recommended value of R2 is 24 kΩ . CIN: Input capacitor (22 µF or larger) CO: Output capacitor (22 µF or larger) For SI-3000KS series, Co has to be a low ESR capacitor. When using the electrolytic capacitor, the SI-3000KS series may oscillate at a low temperature. R1=(VO–VADJ)÷(VADJ/R2) ■Reference Data Copper Laminate Area vs. Thermal Resistance 140 Copper Laminate Area vs. Power Dissipation Area of PC board : 40×40mm 1.2 Tj=100°C Area of PC board : 40×40mm 1 120 Power dissipation PD (W) Thermal resistance θ j-a (°C/W) Ta=25°C 100 80 Ta=50°C Ta=80°C 0.8 • Obtaining the junction temperature Measure the temperature TL at the lead part of the GND pin (pin 7) with a thermocouple, etc. Then, substitute this value in the following formula to obtain the junction temperature. Tj=PD × θ j–L + TL 0.6 ( θ j–L = 22°C/W) 0.4 60 0.2 40 10 100 Copper laminate area (mm2) (GND terminal) 1000 0 10 100 Copper laminate area (mm2) (GND terminal) 1000 ICs 71