Datasheet LTC1874 (Analog Devices) - 12
| Manufacturer | Analog Devices |
| Description | Dual Constant Frequency Current Mode Step-Down DC/DC Controller |
| Pages / Page | 12 / 12 — TYPICAL APPLICATIO. LTC1874 2.5V–8.5V Input to 3.3V/1A and 1.8V/1A Dual … |
| File Format / Size | PDF / 190 Kb |
| Document Language | English |
TYPICAL APPLICATIO. LTC1874 2.5V–8.5V Input to 3.3V/1A and 1.8V/1A Dual Converter. PACKAGE DESCRIPTIO
Model Line for this Datasheet
Text Version of Document
LTC1874
U TYPICAL APPLICATIO LTC1874 2.5V–8.5V Input to 3.3V/1A and 1.8V/1A Dual Converter
VIN 2.5V TO 8.5V CIN R1 R2 10µF LTC1874 0.03Ω 1 8 0.082Ω 16V VIN1 PVIN2 ×2 2 7 SENSE1– PGATE2 M2 L2 4.7µH 3 6 VOUT2 M1 GND1 PGND2 1.8V • VOUT1 L1 4 5 10k + C2 1A 3.3V • VFB1 ITH/RUN2 D2 47µF 1A 10k C1, C2: SANYO POSCAP 6TPA47M 13 12 220pF + 6V C1 ITH/RUN1 VFB2 CIN: TAIYO YUDEN CERAMIC 47µF D1 L1A 220pF 14 11 EMK325BJ106MNT (× 2) 249k ×2 PGND1 GND2 D1: 15MQ040N 15 10 D2: MBRM120 PGATE1 SENSE2– 100k L1: BH-ELECTRONICS BH511-1012 16 9 80.6k L2: COILTRONICS UP2B-4R7 PVIN1 VIN2 M1, M2: Si3443DV 80.6k R1, R2: DALE 0.25W 1874 TA02
U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. GN Package 16-Lead Plastic SSOP (Narrow 0.150)
(LTC DWG # 05-08-1641) 0.189 – 0.196* (4.801 – 4.978) 0.009 0.015 ± 0.004 (0.229) × 45° 0.053 – 0.068 0.004 – 0.0098 16 15 14 13 12 11 10 9 REF (0.38 ± 0.10) (1.351 – 1.727) (0.102 – 0.249) 0.007 – 0.0098 0° – 8° TYP (0.178 – 0.249) 0.016 – 0.050 0.229 – 0.244 0.150 – 0.157** 0.008 – 0.012 0.0250 (0.406 – 1.270) (5.817 – 6.198) (3.810 – 3.988) (0.203 – 0.305) (0.635) BSC * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE GN16 (SSOP) 1098 ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 1 2 3 4 5 6 7 8
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC1147 Series High Efficiency Step-Down Switching Regulator Controllers 100% Duty Cycle, 3.5V ≤ VIN ≤ 16V LTC1622 Synchronizable Low Input Voltage Current Mode Step-Down VIN 2V to 10V, IOUT Up to 4.5A, DC/DC Controller Burst Mode Operation Optional, 8-Lead MSOP LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller 8-Pin N-Channel Drive, 3.5V ≤ VIN ≤ 36V LTC1625 No R TM SENSE Synchronous Step-Down Regulator 97% Efficiency, No Sense Resistor; Up to 10A LTC1626 Low Voltage, High Efficiency Step-Down DC/DC Converter Monolithic, Constant Off-Time, Low Voltage Range: 2.5V to 6V LTC1628 Dual, 2-Phase Synchronous Step-Down Controller Minimum CIN and COUT, 3.5V ≤ VIN ≤ 36V LTC1735 Single, High Efficiency, Low Noise Synchronous Switching Controller High Efficiency 5V to 3.3V Conversion at up to 15A LT1767 1.5A, 500kHz Step-Down Switching Regulators High Frequency, Small Inductor, High Efficiency LTC1772 Constant Frequency Current Mode Step-Down DC/DC Controller VIN 2.5V to 9.8V, IOUT Up to 4A, SOT-23 Package LTC1773 Synchronous Step-Down Controller VIN 2.65V to 8.5V, IOUT up to 4A LTC1877/LTC1878 Low Voltage, Monolithic Synchronous Step-Down Regulator Low Supply Voltage Range: 2.65V to 8V, IOUT = 0.5A No RSENSE is a trademark of Linear Technology Corporation. 1874f LT/TP 0201 4K • PRINTED IN USA 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 2000
U TYPICAL APPLICATIO LTC1874 2.5V–8.5V Input to 3.3V/1A and 1.8V/1A Dual Converter
VIN 2.5V TO 8.5V CIN R1 R2 10µF LTC1874 0.03Ω 1 8 0.082Ω 16V VIN1 PVIN2 ×2 2 7 SENSE1– PGATE2 M2 L2 4.7µH 3 6 VOUT2 M1 GND1 PGND2 1.8V • VOUT1 L1 4 5 10k + C2 1A 3.3V • VFB1 ITH/RUN2 D2 47µF 1A 10k C1, C2: SANYO POSCAP 6TPA47M 13 12 220pF + 6V C1 ITH/RUN1 VFB2 CIN: TAIYO YUDEN CERAMIC 47µF D1 L1A 220pF 14 11 EMK325BJ106MNT (× 2) 249k ×2 PGND1 GND2 D1: 15MQ040N 15 10 D2: MBRM120 PGATE1 SENSE2– 100k L1: BH-ELECTRONICS BH511-1012 16 9 80.6k L2: COILTRONICS UP2B-4R7 PVIN1 VIN2 M1, M2: Si3443DV 80.6k R1, R2: DALE 0.25W 1874 TA02
U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. GN Package 16-Lead Plastic SSOP (Narrow 0.150)
(LTC DWG # 05-08-1641) 0.189 – 0.196* (4.801 – 4.978) 0.009 0.015 ± 0.004 (0.229) × 45° 0.053 – 0.068 0.004 – 0.0098 16 15 14 13 12 11 10 9 REF (0.38 ± 0.10) (1.351 – 1.727) (0.102 – 0.249) 0.007 – 0.0098 0° – 8° TYP (0.178 – 0.249) 0.016 – 0.050 0.229 – 0.244 0.150 – 0.157** 0.008 – 0.012 0.0250 (0.406 – 1.270) (5.817 – 6.198) (3.810 – 3.988) (0.203 – 0.305) (0.635) BSC * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE GN16 (SSOP) 1098 ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 1 2 3 4 5 6 7 8
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC1147 Series High Efficiency Step-Down Switching Regulator Controllers 100% Duty Cycle, 3.5V ≤ VIN ≤ 16V LTC1622 Synchronizable Low Input Voltage Current Mode Step-Down VIN 2V to 10V, IOUT Up to 4.5A, DC/DC Controller Burst Mode Operation Optional, 8-Lead MSOP LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller 8-Pin N-Channel Drive, 3.5V ≤ VIN ≤ 36V LTC1625 No R TM SENSE Synchronous Step-Down Regulator 97% Efficiency, No Sense Resistor; Up to 10A LTC1626 Low Voltage, High Efficiency Step-Down DC/DC Converter Monolithic, Constant Off-Time, Low Voltage Range: 2.5V to 6V LTC1628 Dual, 2-Phase Synchronous Step-Down Controller Minimum CIN and COUT, 3.5V ≤ VIN ≤ 36V LTC1735 Single, High Efficiency, Low Noise Synchronous Switching Controller High Efficiency 5V to 3.3V Conversion at up to 15A LT1767 1.5A, 500kHz Step-Down Switching Regulators High Frequency, Small Inductor, High Efficiency LTC1772 Constant Frequency Current Mode Step-Down DC/DC Controller VIN 2.5V to 9.8V, IOUT Up to 4A, SOT-23 Package LTC1773 Synchronous Step-Down Controller VIN 2.65V to 8.5V, IOUT up to 4A LTC1877/LTC1878 Low Voltage, Monolithic Synchronous Step-Down Regulator Low Supply Voltage Range: 2.65V to 8V, IOUT = 0.5A No RSENSE is a trademark of Linear Technology Corporation. 1874f LT/TP 0201 4K • PRINTED IN USA 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 2000
