SC630EVB

SC630 Fixed 3.3V High Output Charge Pump Buck/Boost Regulator POWER MANAGEMENT Features Input voltage range — 2.9V to 5.5V VOUT tolerance 3.3V ±3% VOUT regulation (line + load) ±2% Continuous output current — 400mA Peak output current — 500mA Three charge pump modes — 1x, 1.5x and 2x Output ripple ≤ 20mVpp for IOUT ≤ 400mA Short circuit, over-voltage, and over-temperature protection Soft-start functionality Shutdown current — 0.1μA, typical Ultra thin package — 2 x 2 x 0.6 (mm) Fully WEEE and RoHS compliant Description The SC630 is a high-current voltage regulator using Semtech’s proprietary low-noise charge pump technology. Performance is optimized for use in single Li-Ion battery cell applications. The regulator provides the performance of a linear, low drop-out (LDO) voltage regulator when the battery is greater than 3.3V. Unlike an LDO, drop-out is avoided when the battery is less than 3.3V. Instead, a charge pump is activated to provide voltage boost — the head-room needed for voltage regulation. Only two 2.2μF bucket capacitors are required to deliver the full output current. The charge pump provides a low EMI solution compared to inductive buck/boost regulators. The SC630’s charge pump has three modes of operation: 2x, 1.5x, and 1x modes. The 2x and 1.5x modes deliver current to the load in each of two phases. The 1x mode turns off the charge pump, delivering current through an LDO. When active, the charge pump provides low-ripple operation at 200kHz, which is typically less than 20mVpp at the output. The SC630 is capable of delivering 400mA continuous current, with peak current to 500mA. A 22μF output capacitor of is used for decoupling the load and for smoothing mode transitions. Hysteresis is provided to prevent chatter between charge pump modes. The micro lead-frame package is both small and thermally efficient, measuring 2 x 2 x 0.6 (mm). Applications Mobile phones MP3 players Multi-LED backlit LCDs Compact flash/CF+ products PMPs Digital video cameras Digital still cameras PDAs Typical Application Circuit CIN 22μF IN OUT VOUT = 3.3V @ 400mA COUT 22μF VBAT SC630 Chip enable EN C1+ C1C2+ GND C2C1 2.2μF C2 2.2μF Patents Pending May 28, 2008 © 2008 Semtech Corporation 1 SC630 Pin Configuration Ordering Information Device SC630ULTRT(1)(2) SC630EVB Package MLPD-UT-8 2x2 Evaluation Board GND 1 TOP VIEW 8 C2- Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Lead-free package only. Device is WEEE and RoHS compliant. C1+ 2 7 C2+ C1- 3 T 6 OUT IN 4 5 EN MLPD-UT-8; 2x2, 8 LEAD θJA = 68°C/W Marking Information 630 yw yw = Datecode 2 SC630 Absolute Maximum Ratings IN, OUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 C1+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to (VOUT + 0.3) Pin Voltage - All Other Pins (V) . . . . . . . . . . . -0.3 to (VIN + 0.3) OUT Short Circuit Duration . . . . . . . . . . . . . . . . . Continuous ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Recommended Operating Conditions Ambient Temperature Range (°C) . . . . . . . . -40 < TA < +85 IN (V) ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 < VIN < 5.5 Thermal Information Thermal Resistance, Junction to Ambient(2) (°C/W) . . . . . 68 Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150 Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150 Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260 Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. NOTES (1) Tested according to JEDEC standard JESD22-A114-B. (2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. Electrical Characteristics Unless otherwise specified: TA = +25°C for Typ, -40°C to +85°C for Min and Max; C1 = C2 = 2.2μF (ESR < 0.03Ω); CIN = COUT = 22μF; VIN = 2.9V to 5.5V Parameter Input Supply Voltage Output Voltage Output Voltage Ripple Symbol VIN VOUT VPP Condition Min 2.9 Typ Max 5.5 Units V V mV mA VIN = 4.2V, IOUT = 1mA IOUT ≤ 400mA Peak Load - thermally limited(1), TJ