LTC3035 300mA VLDO Linear Regulator with Charge Pump Bias Generator DESCRIPTIO FEATURES Wide Input Voltage Range: 1.7V to 5.5V The LTC 3035 is a micropower, VLDO (very low drop- Wide Adjustable Output Voltage Range: out) linear regulator which operates from input voltages as 0.4V to 3.6V low as 1.7V. The device is capable of supplying 300mA of Built-In Charge Pump Generates High Side Bias output current with a typical dropout voltage of only Very Low Dropout: 45mV at 300mA 45mV. To allow operation at low input voltages the LTC3035 2% Voltage Accuracy Over Temperature, includes a charge pump generator that provides the nec- Supply, Load essary bias voltage for the internal LDO circuitry. Output Fast Transient Recovery current comes directly from the input supply for high Low Operating Current: I = 100A Typ efficiency regulation. The charge pump bias generator IN Low Shutdown Current: I = 1A Typ requires only a 0.1F flying capacitor and a 1F bypass IN Stable with Ceramic Capacitor Down to 1F capacitor for operation. The low 0.4V internal reference Output Current Limit voltage allows the LTC3035 to be programmed to much Thermal Overload Protected lower output voltages than commonly available in LDOs. Reverse Output Current Protected The output voltage is programmed via two tiny SMD Available in 8-Lead (3mm 2mm) DFN Package resistors. The LTC3035s low quiescent current makes it U an ideal choice for use in battery-powered systems. APPLICATIO S Other features include high output voltage accuracy, ex- cellent transient response, stability with ultralow ESR Li-Ion to 3.3V Low Dropout Supplies ceramic capacitors as small as 1F, short-circuit and 2 AA to 1.8V Low Dropout Supplies thermal overload protection, output current limiting and Low Power Handheld Devices reverse output current protection. The LTC3035 is avail- Low Voltage Logic Supplies able in a tiny, low profile (3mm 2mm 0.75mm) 8-lead DSP Power Supplies DFN package. Cellular Phones Portable Electronic Equipment , LTC and LT are registered trademarks of Linear Technology Corporation. VLDO is a trademark of Linear Technology Corporation. Handheld Medical Instruments All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6411531, others pending. Post Regulator for Switching Supply Noise Rejection TYPICAL APPLICATIO Dropout Voltage vs Load Current 70 3.3V Output Voltage from Li-Ion Battery T = 25C A 0.1F 60 50 CM CP BIAS 40 BIAS GENERATOR C IN BIAS 30 1F Li-Ion 0.4V + 1F BATTERY V OUT 20 3.4V TO 4.2V OUT 3.3V C OUT 300mA 10 LTC3035 294k 1F ADJ 0 SHDN GND OFF ON 40.2k 0 50 100 150 200 250 300 I (mA) 3035 TA01b 3035 TA01a OUT 3035f 1 DROPOUT VOLTAGE (mV) U ULTC3035 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Notes 1, 2) TOP VIEW V to GND.................................................. 0.3V to 6V IN SHDN to GND ............................................. 0.3V to 6V CP 1 8 BIAS CP, CM, BIAS to GND ................................. 0.3V to 6V CM 2 7 SHDN 9 ADJ to GND ................................................ 0.3V to 6V GND 3 6 ADJ V to GND ............................................... 0.3V to 6V IN 4 5 OUT OUT Operating Junction Temperature DDB PACKAGE (Note 3) ........................................... 40C to 125C 8-LEAD (3mm 2mm) PLASTIC DFN Storage Temperature Range ................ 65C to 125C T = 125C, = 76C/W JMAX JA EXPOSED PAD (PIN 9) IS GND,MUST BE SOLDERED TO PCB Output Short Circuit Duration .......................... Indefinite ORDER PART NUMBER DDB PART MARKING LTC3035EDDB LBRM Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: