●A8181SLB Series A8181SLB Series Allegro Microsystems, INC. product Surface-Mount, Low Circuit Current, Low Dropout Voltage Dropper Type ■Features • Surface-mount package • Output current: 0.5A • Low circuit current Iq≤120µA (Output ON) Iq(off)≤20µA(Output OFF) • Low dropout voltage: VDIF≤0.3V (at IO=0.5A) • Output ON/OFF control terminal is compatible with LS-TTL. • Built-in thermal protection circuit ■Applications • Portable phones and PHS telephones • Battery-driven electronic equipment ■Absolute Maximum Ratings Parameter (Ta=25°C) Symbol Ratings Unit DC Input Voltage VIN 10 V DC Output Current IO 0.6 A Power Dissipation PD 1.9(TC=25°C) W Junction Temperature Tj +150 °C Ambient Operating Temperature Top –20 to +85 °C Storage Temperature Tstg –40 to +150 °C 12 ●A8181SLB Series ■Electrical Characteristics (Ta=25°C unless otherwise specified) Ratings Parameter Symbol A8181SLB typ. Input Voltage max. VIN 10 VO Output Voltage 4.85 Conditions 5.00 5.15 0.3 Conditions 10 Conditions of Output Voltage ∆VO/∆Ta Iq(off) Conditions VO(off) (Output ON) Conditions Control Voltage VC. OL (Output OFF) Conditions mV/°C 120 µA 20 µA VIN=10V, IO=0 to 0.5A 10 Control Voltage VIN=10V, IO=0A, VC=0.4V 2.4 V VIN=10V, Ta=–20 to +85°C 0.4 V VIN=10V, Ta=–20 to +85°C IC Input Current ±1.0 92 Current mV Tj=–20 to +85°C Iq Terminal* 100 ±0.5 Conditions Quiescent Circuit mV VIN=6V, IO=0 to 0.5A Conditions Circuit Current 30 50 Conditions Temperature Coefficient V VIN=5.5 to 10V, IO=0A ∆VOLOAD Load Regulation V IO=0.5A ∆VOLINE Line Regulation V VIN=5.5 to 10V, IO=0 to 0.5A, Ta=–20 to +85°C VDIF Dropout Voltage VC Unit min. –0.1 Conditions +0.1 µA +1.0 µA Ta=25°C IC –1.0 Conditions Ta=85°C * Output is OFF when output ON/OFF terminal is open. ■Outline Drawing IDENTIFICATION LEAD No.1 (unit: mm) 10.10/10.50 0.23/0.32 16 15 14 13 12 11 10 9 0° TO 8° a. Part Number b. Lot Number a 7.4/7.6 10.00/10.65 b 0.40/1.27 1 2 3 4 5 6 7 8 1.27typ 2.35/2.65 0.33/0.46 0.10 MIN. SEATING PLANE q w e r t y u i NC NC NC GND GND VC VIN VIN o !00 !11 !2 !3 !4 !5 !6 NC NC NC GND GND NC VO VO Connect VIN terminals (pin 7,8) and VO terminals (pin 15,16) externally. 13 ●A8181SLB Series ■Block Diagram VIN u !5 VO Amp. VIN i Reg. VC y !6 VO Drive ENABLE TSD VREF GND 4,5,12,13 NC q,w,e,o,!0,!1,!4 ■Standard External Circuit 7 8 VIN VIN 6 VC Battery VO 15 VO 16 GND 4, 5, 12, 13 *1 C1 + 2 * C0 LOAD *1 C1: Oscillation prevention capacitor (Approx. 0.33µF) *2 C2: Output capacitor (Approx. 4.7µF) ■Ta-PD Characteristics Power Dissipation PD (W) 2.5 2.0 1.5 1.0 0.5 0 –20 0 25 50 75 Ambient Temperature Ta (°C) PD=IO•[VIN(mean)–VO] 14 100 ●A8181SLB Series ■Typical Characteristics (Ta=25°C) 0.2 0.1 5 100 75 A IO =0 A 0.5 IO= 50 0 0.1 0.2 0.3 0.4 Output Current IO (A) 0.5 0 0 3 2 1 25 0 4 0.5 A 0.3 125 IO= Circuit Current Iq (µA) Dropout Voltage VDIF (V) 0.4 Rise Characteristics 6 IO= 0A Circuit Current 150 Output Voltage VO (V) IO vs. VDIF Characteristics 0.5 1 2 3 4 5 6 7 Input Voltage VIN (V) 8 9 10 0 0 1 2 3 4 5 6 7 8 9 10 Input Voltage VIN (V) 15