NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
DC667 LTC3416 LTC3416EFE IHLP-2525CZ-47 DC667A-1 1/16W TSSOP20FE 04023A220KAT2A - Datasheet Archive
4A MONOLITHIC SYNCHRONOUS STEP-DOWN REGULATOR WITH TRACKING LTC3416 DESCRIPTION Demonstration circuit 667 is a high efficiency,
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC667 DC667 4A MONOLITHIC SYNCHRONOUS STEP-DOWN REGULATOR WITH TRACKING LTC3416 LTC3416 DESCRIPTION Demonstration circuit 667 is a high efficiency, high frequency buck converter, incorporating the LTC3416 LTC3416 monolithic synchronous regulator. DC667 DC667 operates in forced continuous operation and provides tracking of another power supply rail. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage from 0.8V to 5V. DC667 DC667 can deliver high power up to 4A of output current - in a relatively small circuit, thanks to 67mohm high cur- rent power switches in the LTC3416 LTC3416. The LTC3416 LTC3416 also incorporates OPTI-LOOP compensation, so that the DC667 DC667 can be optimized to provide fast transient response over a wide range of line and load conditions. All these features make the DC667 DC667 perfectly suited for battery powered, hand-held applications. Design files for this circuit board are available. Call the LTC factory. QUICK START PROCEDURE Demonstration circuit DC667 DC667 is easy to set up to evaluate the performance of the LTC3416EFE LTC3416EFE. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the VIN or VOUT and GND terminals. See Figure 2 for proper scope probe technique. 1. Place jumper JP1 in the ON position. 2. Connect Jumper JP4 for 2.5V Output Voltage. Leave JP3, JP5 and JP6 unconnected. 3. With power off, connect the input power supply VIN to VIN and GND. 4. Connect TRACK terminal to VIN (JP2 to Off posi- tion), tracking function is disabled. 5. Apply input power at the VIN slowly, by increasing VIN from 0V to 5.5V. NOTE: Make sure that the input voltage VIN does not exceed 5.5V. 6. Check for the output voltages VOUT = 2.5V If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 7. Once the proper output voltages are established, adjust the loads within 4A range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. 8. To test tracking functions, place JP2 to ON posi- tion, and connect TRACK terminal to 1.25V Voltage supply (through a voltage divider, the voltage on Track pin of the IC is about 550mV), the output voltage will be regulated at 1.75V. 9. Connect TRACK terminal to GND, the VOUT should be less than 200mV in normal operation. 10. To test 1.8V output voltage, connect JP3 and leave JP4, JP5 and JP6 unconnected. Repeat the procedure 3 to 7. Follow the similar procedure for other output voltage tests. 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC667 DC667 4A MONOLITHIC SYNCHRONOUS STEP-DOWN REGULATOR WITH TRACKING Figure 1. Proper Measurement Equipment Setup GND VIN Figure 2. Scope Probe Placement for Measuring Input or Output Ripple 2 5 4 3 2 U1 LTC3416EFE LTC3416EFE TP1 7 VIN 2.5-5.5V CIN1 100uF 6.3V 1210 CIN2 100uF 6.3V 1210 CIN3 100uF 6.3V 7343 OPT CIN4 1210 OPT RSS 2.2M SW 8 SW 9 PVIN 15 NC SVIN TP3 COUT1 100uF 6.3V 1210 SW 12 SW 13 RPG 100K TP5 PGOOD RT 2 JP2 TRACK ON PGND R3 255K 1% OFF COUT3 100uF 6.3V 7343 OPT TP4 D GND R1 200K 1% CITH 820pF 1.8V JP3 RFB2 432K 1% C1 47pF RFB1 255K 1% 2.5V JP4 RFB3 634K 1% RITH 7.5K 1% RT 294K 1% 20 11 10 5 TP6 PGND TRACK PGND RUN/SS 3 SGND PGOOD 4 COUT2 100uF 6.3V 1210 VOUT 4A MAX CFF 22pF VFB 19 ITH 18 PGND 17 JP1 VOUT OFF ON TRACK 14 16 TP2 GND C NC VISHAY IHLP-2525CZ-47 IHLP-2525CZ-47 L1 0.47uH PVIN 6 1 D 1 3.3V JP5 RFB4 OPT R2 200K 1% C USER SELECT JP6 B B NOTES: UNLESS OTHERWISE SPECIFIED BOARD LAYOUT 2. ALL CAPACITORS ARE IN MICROFARAD, 0402. CITH R1 C1 RT R2 1. ALL RESISTORS ARE IN OHMS, 0402. 3. INSTALL SHUNTS ON JP1 AND JP2 PIN 2 AND 3, JP4 PIN 1 AND 2. RITH RPG A CUSTOMER NOTICE COUT1 CIN2 CIN1 U1 L1 RSS CONTRACT NO. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 APPROVALS DRAWN: CHECKED: TECHNOLOGY KIM T. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC A 4A, MONOLITHIC, SYNCHRONOUS STEP-DOWN APPROVED: ENGINEER: RAYMOND Z. SIZE DESIGNER: REGULATOR WITH TRACKING DWG NO. A DATE: DC667A-1 DC667A-1 * LTC3416EFE LTC3416EFE Friday, January 09, 2004 2 SHEET 1 1 REV A OF 1 Linear Technology Corporation LTC3416EFE LTC3416EFE 4A, MONOLITHIC, SYNCHRONOUS STEP-DOWN REGULATOR WITH TRACKING ENG: RAYMOND ZHENG (23-30) Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Qty Reference 1 4 0 0 1 1 0 2 4 3 1 2 1 1 0 1 1 1 1 2 0 6 1 4 4 1 CFF CIN1,CIN2, COUT1,COUT2 CIN3,COUT3 (OPT) CIN4 (OPT) CITH C1 C2 (OPT) JP1,JP2 JP3,JP4,JP5,JP6 SHUNTS FOR JP1,JP2,JP4 L1 RFB1,R3 RFB2 RFB3 RFB4,RFB5 RITH RPG RSS RT R1,R2 R4 (OPT) TP1-TP6 U1 BILL OF MATERIALS DC667A-1 DC667A-1 6/20/2005 Part Description Manufacture / Part # Cap., NPO 22pF 25V 10% Cap., X5R 100uF 6.3V 20%,1210 Cap., X5R 100uF 6.3V 20%,7343-1812 Cap., X5R,1210 Cap., X7R 820pF 25V 20% Cap., NPO 47pF 25V 10% Cap., NPO 39pF 25V 10% Headers, 3 Pins 2mm Ctrs. Jumper, 2pins 2mm Ctrs. Shunt, 2 Pins 2mm Ctrs. Inductor, 0.47uH Res., Chip 255K 1/16W 1/16W 1% Res., Chip 432K 1/16W 1/16W 1% Res., Chip 634K 1/16W 1/16W 1% Jumper, Chip 0 1/16W 1/16W 5% Res., Chip 7.5K 1/16W 1/16W 1% Res., Chip 100K 0.06W 5% Res., Chip 2.2M 1/16W 1/16W 5% Res., Chip 294K 0.06W 1% Res., Chip 200K 1/16W 1/16W 1% Res., Chip 1K 0.06W 5% Turret, Testpoint I.C., Step-Down Reg., TSSOP20FE TSSOP20FE SCREW, #4-40, 1/4" STANDOFF, #4-40 1/4" AVX 04023A220KAT2A 04023A220KAT2A TDK C3225X5R0J107M C3225X5R0J107M TDK C3225X5R0J107M C3225X5R0J107M or POSCAP 6TPE150M 6TPE150M OPT AVX 04023C821MAT2A 04023C821MAT2A AVX 04023A470KAT2A 04023A470KAT2A AVX 04023A390KAT2A 04023A390KAT2A CommConn Con. Inc. 2802S-03G2 2802S-03G2 CommConn Con. Inc. 2802s-02g2 CommConn Con. Inc. CCIJ2MM-138G CCIJ2MM-138G VISHAY IHLP-2525CZ-47 IHLP-2525CZ-47 AAC CR05-2553FM CR05-2553FM AAC CR05-4323FM CR05-4323FM AAC CR05-6343FM CR05-6343FM OPT AAC CR05-7501FM CR05-7501FM AAC CR05-104JM CR05-104JM AAC CR05-225JM CR05-225JM AAC CR05-2943FM CR05-2943FM AAC CR05-2003FM CR05-2003FM AAC CR05-102JM CR05-102JM Mill Max 2501-2 Linear Tech. Corp. LTC3416EFE LTC3416EFE ANY MICRO PLASTICS 14HTSP101 14HTSP101 STENCIL FOR TOP SIDE Page 1 - of - 1