PIC9310 Async Boost with 600KHz switching FEATURES PFM control Asynchronous Booster Up to 86% Efficiency Quiescent Supply Current: 4.5µA Zero Shutdown current Output Voltage Accuracy: ±1% Fixed Output Voltage Provides 20mA from single AAA cell Input Voltage Range: 0.8V to 5.5V Startup Voltage : 0.9V 6L SOT-26 Package APPLICATIONS Cellular and cordless phones Wireless LAN cards Palmtop computers Personal communication equipment Pen drives Bluetooth devices DESCRIPTION The PIC9310 compact, high-efficiency, step-up DCDC converters are available in tiny, 6-pin thin SOT26 packages. They feature an extremely low 5µA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metalhydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical. The PIC9310 also feature proprietary noisereduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed outputs, shutdown, and EMI reduction (see Selector Guide). Its unique design is optimized for high efficiency at light load condition. TYPICAL APPLICATION CIRCUIT www.picsemi.com Road-8, House-2/A, Baridhara Diplomatic Area, Dhaka-1212, Phone: +880-2- 8861966, Fax: +880-2-8835244 1 PIC9310 Async Boost with 600KHz switching ELECTRICAL CHARACTERISTICS (Typical values are at TA = +25°C. VBATT = 1.2V, VOUT = 3.3V, VOUT = VOUT(NOM), SHDN = OUT, RL = ∞, unless otherwise noted.) Parameter Operating Input Voltage Output Voltage variation Minimum Startup Input Voltage Symbol VIN VOUT Conditions Min Typ 3.224 3.307 0.86 ( Note 1 ) IOUT=1mA, VIN:0 -> 2V Hold on Voltage IOUT=1mA, VIN:0 -> 2V No Load Input Current IOUT =0mA Measured from SW pin voltage and inductor current during SW on time VOUT forced = VOUT (NOM) * 0.95 75 VOUT forced = VOUT (NOM) * 0.95 70 N-Channel On-Resistance Maximum oscillating freq RDS(ON) FOSC Duty ratio DMAX Efficiency Eff Quiescent Current into OUT (no switching) Quiescent Current into OUT Switch leakage SHDN Voltage Threshold SHDN Input Bias current LBI voltage threshold Max 5.5 3.389 0.92 Unit V V V 0.7 V 10 1.4 µA Ω 107 140 77 85 KHz % 86 % VIN= VOUT +0.5V (VOUT pin) (Notes 2, 3) 4.5 µA VOUT forced = VOUT (NOM) * 0.95 13 µA 1 nA VSW=5.5V,VIN= VOUT + 0.5V 1.2 VIL VIH 0.4 VSHDN = 5.5V 1.1 645 670 mV nA 700 LBI input hysteresis VOUT forced = VOUT (NOM)*1.05 VOUT forced = VOUT (NOM)*1.05 18 mV LBI input current VOUT forced = VOUT (NOM)*1.05 0.02 nA Force 20mA into LBO 0.5 LBO output low voltage 0.6 mV V Note 1: Guaranteed with the addition of a Schottky MBR0520L external diode between LX and OUT when using the PIC9310 with only one cell, and assumes a 0.3V voltage drop across the Schottky diode. Note 2: Supply current is measured with an ammeter between the output and OUT pin. This current correlates Directly with actual battery supply current, but is reduced in value according to the step-up ratio and efficiency. Note 3: VOUT forced to the following conditions to inhibit switching: VOUT = 1.05 * VOUT(NOM), VOUT = 3.307V. www.picsemi.com Road-8, House-2/A, Baridhara Diplomatic Area, Dhaka-1212, Phone: +880-2- 8861966, Fax: +880-2-8835244 2