SC630AULTRT Semtech

SC630A 1MHz Fixed 3.3V Output Charge Pump Regulator POWER MANAGEMENT Features Description Input voltage range 2.95V to 5.5V The SC630A is a high-current voltage regulator using V tolerance 3.3V 3% Semtechs proprietary low-noise charge pump technol- OUT Continuous output current 300mA max ogy. The charge pump provides a low EMI solution Three charge pump modes x, .5x and 2x compared to inductive boost regulators. Performance is Output ripple voltage 33mV , typical optimized for use in single Li-Ion battery cell applications. PP Short circuit, over-voltage, and over-temperature The regulator provides the performance of a linear, low protection drop-out (LDO) voltage regulator when the battery is Soft-start functionality greater than 3.3V. Unlike an LDO, drop-out is avoided Shutdown current 0.A, t ypical when the battery is less than 3.3V. Instead, a charge pump Ultra thin package 2 x 2 x 0.6 (mm) is activated to provide voltage boost and the head-room Lead-free and halogen-free needed for regulation. WEEE and RoHS compliant The SC630As charge pump has three modes of operation: Applications 2x, .5x, and x modes. The 2x and .5x modes deliver current to the load in each of two phases. The x mode Mobile phones turns off the charge pump, delivering current through an Tablets LDO. Hysteresis is provided to prevent chatter between USB On-The-Go charge pump modes. When active, the charge pump pro- Multi-LED backlit LCDs vides low-ripple operation at MHz. Typically the output Compact flash/CF+ products ripple is % of the output voltage 33mVpp at 2 5mA. Digital video cameras DVI/HDMI ports A small 2.2F capacitor is recommended for all four capaci- Wi-Fi base stations tors. The full rated output current is provided when 2.2F Modems is used for both bucket capacitors. At the output, a 2.2F Set-top boxes capacitor decouples the load and provides smoothing for mode transitions, while another 2.2F is used to decouple the input. Typical Application Circuit V = 3.3V 300mA OUT IN OUT C C IN OUT V BAT 2.2F 2.2F SC630A C1+ Chip EN C 1 enable C1- 2.2F C2+ C 2 GND 2.2F C2- US Patent: 7,808,220 Rev 20 S emtech Corporation SC630A Pin Configuration Ordering Information Device Package ( )(2) SC630AULTRT MLPD-UT-8 2x2 SC630AEVB Evaluation Board Notes: () Available in tape and reel only. A reel contains 3,000 devices. GND C2- 1 8 (2) Lead-free package only. Device is WEEE and RoHS compliant and TOP VIEW halogen free. C1+ 2 7 C2+ C1- 3 6 OUT T IN 5 EN 4 MLPD-UT-8 2x2, 8 LEAD = 68C/W JA Marking Information K0A yw yw = Datecode 2