Analog Devices DC2851A User Manual Download Page 9

 

DC2851A User Guide 

 

LT7200S 

Quad 18V, ±5A 

Synchronous Monolithic 

Step-Down Regulator   

 

www.analog.com 

 

Analog Devices | 9 

 

23 

R43 

RES.,4.99k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW06034K99FKEA 

24 

R51 

RES.,26.1k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW060326K1FKEA 

25 

R52 

RES.,56.2k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW060356K2FKEA 

26 

R53 

RES.,14k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW060314K0FKEA 

27 

R54 

RES.,90.9k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW060390K9FKEA 

28 

R71 

RES.,10k 
OHMS,1%,1/10W,0603 

VISHAY, CRCW060310K0FKEA 

29 

R72 

RES.,0.01OHM,1%,1W,2512, 
PWR, METAL,SENSE 

VISHAY, WSL2512R0100FEA 

30 

U1 

IC,18V,±5A, Synch. Buck 
Regulator, LQFN-48 

ANALOG DEVICES, 
LT7200SAV#PBF 

Additional Evaluation Kit Components

 

FB1 

IND.,100 OHMS@100MHz, 
FERRITE 
BEAD,25%,8A,6mOHMS,1812 

WURTH ELEKTRONIK, 
74279226101 

C59 

CAP.,1uF, X5R,25V,10%,0402 

MURATA, GRM155R61E105KA12D 

C60,C61,C64,C65 

CAP.,0.22uF, 
X5R,25V,10%,0402 

MURATA, GRM155R61E224KE01D 

C62,C63 

CAP.,22uF, X7R,25V,10%,1210 

MURATA, GRM32ER71E226KE15L 

L5 

IND.,0.33uH, PWR, SHIELDED, 
SMD 

WURTH ELEKTRONIK, 
744373360033 

C8,C13,C17,C18,C55 
(OPT) 

CAP., OPTION, 0603 

 

C57 (OPT) 

CAP., OPTION, 1206 

 

R2,R33,R34,R48,R55,
R56,R57,R58,R59,R60,
R62,R63,R64,R65,R66,
R67,R68,R69,R70 
(OPT) 

RES., OPTION, 0603 

 

R32,R47 (OPT) 

RES., OPTION, 1206 

 

Hardware for Evaluation Kit Only

 

16 

E2,E3,E4,E5,E6,E12,E
14,E15,E16,E17,E18,E
19,E20,E21,E27,E28 

TEST POINT, TURRET,0.094" 
MTG. HOLE, PCB 0.062" THK 

MILL-MAX, 2501-2-00-80-00-00-07-0 

19 

E8,E9,E10,E11,E13,E2
2,E23,E24,E25,E26,E2

TEST POINT, TURRET,0.064" 
MTG. HOLE,PCB 0.062" THK 

MILL-MAX, 2308-2-00-80-00-00-07-0 

Summary of Contents for DC2851A

Page 1: ...he low quiescent current shutdown mode with its own TRACK or RUN pin A user selectable MODE SYNC pin on the evaluation kit allows the part to operate in either discontinuous mode for higher efficiency...

Page 2: ...IOUT 0A to 5A per Channel 1 15 1 2 1 25 V VOUT2 Default Output Voltage VIN 12V IOUT 0A to 5A per Channel 1 73 1 8 1 87 V VOUT3 Default Output Voltage VIN 12V IOUT 0A to 5A per Channel 3 17 3 3 3 43 V...

Page 3: ...or output voltage ripple take care to avoid a long ground lead on the oscilloscope probe Measure the output voltage ripple by touching the probe tip directly across the output capacitor See Figure 2...

Page 4: ...DC2851A User Guide LT7200S Quad 18V 5A Synchronous Monolithic Step Down Regulator www analog com Analog Devices 4 Figure 1 Proper Measurement Equipment Setup...

Page 5: ...ithic Step Down Regulator www analog com Analog Devices 5 Figure 2 Scope Probe Placement for Measuring Input or Output Voltage Ripple Typical Performance Characteristics Figure 3 DC2851A Efficiency vs...

Page 6: ...DC2851A User Guide LT7200S Quad 18V 5A Synchronous Monolithic Step Down Regulator www analog com Analog Devices 6...

Page 7: ...s Monolithic Step Down Regulator www analog com Analog Devices 7 Figure 4 DC2851A EMI Performance in CISPR25 Conducted and Radiated Emission Tests VEMI 14V VOUT1 1 2V VOUT2 1 8V VOUT3 3 3V VOUT4 5V IO...

Page 8: ...J105KA T 9 8 C46 C47 C48 C49 C66 C67 C68 C69 CAP 4 7uF X5R 10V 10 0402 TDK C1005X5R1A475K050BC 10 4 C50 C51 C52 C53 CAP 100pF C0G 50V 5 0603 TDK CGA3E2C0G1H101J080AA 11 1 C58 CAP 100uF ALUM ELECT 25V...

Page 9: ...s 1 1 FB1 IND 100 OHMS 100MHz FERRITE BEAD 25 8A 6mOHMS 1812 WURTH ELEKTRONIK 74279226101 2 1 C59 CAP 1uF X5R 25V 10 0402 MURATA GRM155R61E105KA12D 3 4 C60 C61 C64 C65 CAP 0 22uF X5R 25V 10 0402 MURAT...

Page 10: ...JACK FEMALE THT NON INSULATED SWAGE 0 218 KEYSTONE 575 4 4 5 JP1 JP2 JP3 JP4 JP6 CONN HDR MALE 1x3 2m0000m VER T ST THT WURTH ELEKTRONIK 62000311121 5 1 JP5 CONN HDR MALE 2x3 2mm VERT ST THT WURTH ELE...

Page 11: ...DC2851A User Guide LT7200S Quad 18V 5A Synchronous Monolithic Step Down Regulator www analog com Analog Devices 11 Schematic Diagram...

Page 12: ...DC2851A User Guide LT7200S Quad 18V 5A Synchronous Monolithic Step Down Regulator www analog com Analog Devices 12 Schematic Diagram continued...

Page 13: ...nd reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties that may result from its use Specifications subject...

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