1-1-4 Linear Regulator ICs SI-3000LLSL Series Surface-Mount, Low Current Consumption, Low Dropout Voltage ■Features ■Absolute Maximum Ratings • Low input voltage (1.3V) and low output voltage (1.0V) • Compact surface-mount package (SOP8) • Low dropout voltage: VDIF ≤ 0.3V (at IO = 1.5A) • Built-in overcurrent, input-overvoltage and thermal protection circuits • Built-in ON/OFF function (OFF state circuit current: 1µA max.) • Compatible with low ESR capacitors Parameter (Ta=25°C) Symbol Ratings Unit DC Input Voltage VIN 10 DC Bias Voltage VB 10 Output Control Terminal Voltage VC VIN DC Output Current IO 1.5 Power Dissipation PD*1 1.1 V V V A W Junction Temperature Tj –30 to +125 °C Operating Ambient Temperature Top –30 to +100 °C Storage Temperature Tstg –30 to +125 °C Thermal Resistance (Junction to Lead (Pin 8)) θ (j-L) 36 °C/W Thermal Resistance (Junction to Ambient Air) θ (j-a)*1 100 °C/W *1: When mounted on glass-epoxy board of 40 × 40mm (copper laminate area 100%). ■Applications • On-board local power supply • For stabilization of the secondary-side output voltage of switching power supplies ■Recommended Operating Conditions Ratings Parameter Symbol VIN VB IO Top Input Voltage Bias Voltage Output Current Operating Ambient Temperature Unit SI-3010LLSL 1.4 to 3.6*1 3.3 to 5.5 0 to 1.5*1 –20 to +85*1 V V A °C *1: VIN (max) and IO (max) are restricted by the relation PD = (VIN - VO) × IO. ■Electrical Characteristics (Ta=25°C, VC=2V, VIN=1.8V, VB=3.3V, VO=1.5V, unless otherwise specified) Ratings Parameter Symbol SI-3010LLSL min. VADJ Reference Voltage 1.000 1.020 IO=10mA 10 Conditions VIN=1.7 to 2.5V, IO=10mA 30 ∆VOLOAD Load Regulation Conditions VIN=1.8V, IO=0 to 1.5A VDIF Dropout Voltage 0.3 Conditions IO=1.0A Iq Quiescent Circuit Current 500 Conditions Circuit Current at Output OFF Temperature Coefficient of Output Voltage Iq (OFF) 1 Conditions VC=0V ±0.2 Conditions IS1 800 IO=0A, R2=10kΩ ∆VO/∆Ta Overcurrent Protection Starting Current*1 1.6 Conditions VC, IH VC, IL 0.8 IC, IH 50 Control Current (Output OFF) Conditions 2 mV V µA µA V VC=2.7V IC, IL Conditions mV A VIN=1.8V, VB=3.3V Control Voltage (Output OFF) Control Current (Output ON) V mV/ °C Tj=0 to 100°C ON)*2 Control Voltage (Output Terminal max. ∆VOLINE Line Regulation VC 0.980 Conditions Unit typ. 10 VC=0.4V V µA µA *1: IS1 is specified at the 5% drop point of output voltage VO on the condition that VIN = overcurrent protection starting current, IO = 10 mA. *2: Output is OFF when the output control terminal (VC terminal) is open. Each input level is equivalent to LS-TTL level. Therefore, the device can be driven directly by LS-TTLs. 76 ICs SI-3000LLSL Series ■External Dimensions (SOP8) (unit : mm) Pin Assignment q VO w ADJ e VB r VC t GND y GND u VIN i VIN 5.1±0.4 1.27 6 5 1 2 3 4 6.2±0.3 7 4.4±0.2 8 0.15+0.1 –0.05 0.5±0.1 0.4±0.1 0t 1.5±0.1 1.55±0.15 0.05±0.05 0.10 0.4±0.1 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 0.1g o1 0° 1.27 0.995max. 0.12 M ■Typical Connection Diagram/Block Diagram VIN VOUT 1 7 + CSS R1 8 R1 CIN OCP R2 AMP1 - ON/OFF - ADJ 2 - TSD + + CB 4 VC OCP(2) Drive REF 3 + VB 6 + 5 GND Open:OFF Low: OFF High: ON CO CIN, CB: Input and bias capacitors (Approx. 0.1 to 10µF) Required when the input line contains inductance or when the wiring is long. CO: Output capacitor (47µF or larger) SI-3010LLSL is designed to use a low ESR capacitor (such as a ceramic capacitor) for the output capacitor. The recommended ESR value for an output capacitor is 500mΩ or less (at room temperature). R1, R2: Output voltage setting resistors The output voltage can be set by connecting R1 and R2 as shown at left. The recommended value for R2 is 10kΩ. R1= (VO–VADJ) / (VADJ/R2) CSS:Soft start capacitor The rising time of the output voltage can be set by connecting CSS between VOUT and ADJ. ■Reference Data Copper Laminate Area - Power Dissipation 1.2 Ta=25°C Pd (W) 1 Ta=50°C 0.8 0.6 Ta=80°C 0.4 0.2 0 10 100 1000 2 Copper Laminate Area (mm ) ICs 77