LT1310 Datasheet | Linear Technology

LT1310 1.5A Boost DC/DC Converter with Phase-Locked Loop Features s s s s DESCRIPTIO s s s Synchronizable or Constant Frequency Low Noise Output Synchronizable Up to 4.5MHz Wide Input Voltage Range: 2.8V to 18V Low Profile Surface Mount Solution (All Ceramic Capacitors) Low VCESAT Switch: 240m V at 1A Adjustable Output from VIN to 35V Small Thermally Enhanced 10-Lead MSOP Package The LT®1310 boost DC/DC converter bines a 1.5A current mode PWM switcher with an integrated phaselocked loop, allowing the user to set the switching frequency anywhere from 10k Hz to 4.5MHz. Intended for use in applications where switching frequency must be accurately controlled, the LT1310 can generate 12V at up to 400m A from a 5V input. Switching frequency is set with an external capacitor, and the device can be operated in either free-running or phaselocked mode. A wide capture range of nearly 2:1 allows the free-running frequency to be set using standard ±10% tolerance NP0 dielectric capacitors. The LT1310 is available in the tiny thermally enhanced 10-lead MSOP package. , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S s s s s s s Instruments Avionics Data Acquisition munications Imaging Ultrasound TYPICAL APPLICATIO VIN 5V L1 5.6µH C1 4.7µF CERAMIC LT1310 VIN SHDN SYNC PLL-LPF VC 3.01k 1500p F 15k 820p F CT GND- SW FB D1 VOUT 12V 400m A 178k 90 85 80 75 SHUTDOWN SYNC 1.6MHz 20.5k EFFICIENCY (%) 70 65 60 55 50 45 40 35 0 100 200 300 LOAD CURRENT (m A) 400 1310 F01b 100p F NP0 C2 4.7µF CERAMIC 1310 F01a C1: 4.7µF, X5R OR X7R, 6.3V C2: 4.7µF, X5R OR X7R, 16V D1: MICROSEMI UPS120 OR EQUIVALENT L1: PANASONIC ELL6SH-5R6M - EXPOSED PAD MUST ALSO BE GROUNDED Figure 1. 5V to 12V Converter Synchronized at 1.6MHz 1310f LT1310 Efficiency VOUT = 12V 3.3VIN 5VIN ABSOLUTE (Note...