DC639A

A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Gnd
Gnd
SHDN
SYNC
PGOOD PGFB
Vin
4V-60V*
OPTION
1812
AVX
D-CASE
* Transients Up to 60V, See Quick Start Guide
Vout
Circuit That Meets Customer-Supplied Specifications;
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
Linear Technology Has Made A Best Effort To Design A
Supplied For Use With Linear Technology Parts.
This Circuit Is Proprietary To Linear Technology And
Circuit Board Layout May Significantly Affect Circuit
Applications Engineering For Assistance.
Application. Component Substitution And Printed
However, It Remains The Customer's Responsibility To
Performance Or Reliability. Contact Linear Technology
Verify Proper And Reliable Operation In The Actual
Customer Notice
3.3V at 1A
6.3V
NIOBIUM
80mOhm
DEMO 639A LT1977IFE
High Voltage 1.5A 500kHz Step-Down Converter with Burst Mode
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
1 1Monday, August 23, 2004
Title
Size Document Number Rev
Date: Sheet
of
Vout
Vout
Vin
TP6
C3
2.2uF
TDK
100V
+
C10
(Opt.)
C11
10pF
TP7
C8
0.01uF
TP8
R9
200k
R10
0
R3
100k
1%
TP4
C1
330pF
R1
24k
R4
24k
TP3
TP5
C2
1500pF
D4
(Opt.)
R11
(Opt.)
C7
0.01uF
R2
165k
1%
TP2
C4
0.1uF
R12
(Opt.)
D2
1N4148W
D1
B260A
L1
15uH
CDRH6D28-150NC
C6
(Opt.)
+
C5
100uF
R8
100k
1%
U1
LT1977IFE
4
15
14
7
13
8
9
16
11
12
10
2
6
1
3
5
VIN
SHDN
SYNC
CT
PGFB
GND
CSS
PG
VC
FB
BIAS
SW
BOOST
N/C
N/C
N/C
TP1
Linear Technology Corporation
LT1977IFE
Bill Of Material
Demo Bd. #639A
6/17/2005
Item Qty Reference Part Description Manufacture / Part #
1 1 C11 CAP., NPO, 10pF, 25V, 5% AVX 06033A100JAT2A
2 1 C1 CAP., NPO , 330pF, 25V, 5% AVX 06033A331JAT2A
3 1 C2 CAP., NPO, 1500pF, 25V, 5% AVX 06033A152JAT2A
4 1 C3 CAP., X7R, 2.2uF, 100V, 10% TDK C4532X7R2A225K
5 2 C7,C8 CAP., X7R, 0.01uF, 16V, 10% AVX O603YC103KAT
6 1 C4 CAP., X7R 0.1uF 16V 20% TAIYO YUDEN EMK107BJ104MA
7 1 C5 CAP., Niobium 100uF 6.3V D case AVX NOSD107M006
8 0 C6,C10 (OPT)
9 1 D1 DIODE, chottky Rect., 2.0Amp\60V DIODES INC. B260A-13 SMA
10 1 D2 DIODE, Switching Diode DIODES INC., 1N4148W-7 SOD123
11 0 D4 (OPT)
12 1 L1 INDUCTOR, 15uH SUMIDA CDRH6D28-150NC
13 1 R10 RES., Chip 0 AAC CJ06-000M
14 1 R2 RES., Chip 165K 0.06W 1% AAC CR16-1653FM
15 2 R3,R8 RES., Chip 100K 0.1W 1% AAC CR16-1003FM
16 1 R9 RES., Chip 200K 0.06W 5% AAC CR16-204JM
17 2 R1,R4 RES., Chip 24K 0.06W, 5% AAC CR16-243JM
18 0 R11,R12 (OPT)
19 7 TP1-TP7 TURRET, Testpoint Mill Max 2501-2
20 0 TP8 (OPT)
21 1 U1 I.C., Step-Down Reg.
Linear Tech. Corp. LT1977IFE
***
*
Page 1 - of - 1

DC639A

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Power Management IC Development Tools LT1977IFE - High Voltage 1.5A 500kHz Ste
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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