LTC1872BES6 LINER [Linear Technology], LTC1872BES6 Datasheet - Page 12

• Manufacturer Part Number: LTC1872BES6
• Description: Constant Frequency Current Mode Step-Up DC/DC Controller in ThinSOT
• Manufacturer: LINER [Linear Technology]

RELATED PARTS
LTC1872B
TYPICAL APPLICATIO S
PART NUMBER
LT1304
LT1610
LT1613
LT1619
LT1680
LTC1624
LT1615
LTC1700
LTC1772
LTC1872
LTC3401/LTC3402 1A/2A, 3MHz Micropower Synchronous Boost Converter
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
DESCRIPTION
Micropower DC/DC Converter with Low-Battery Detector
1.7MHz, Single Cell Micropower DC/DC Converter
1.4MHz, Single Cell DC/DC Converter in 5-Lead ThinSOT
Low Voltage Current Mode PWM Controller
High Power DC/DC Step-Up Controller
High Efficiency SO-8 N-Channel Switching Regulator Controller
Micropower Step-Up DC/DC Converter in ThinSOT
No R
Constant Frequency Current Mode Step-Down DC/DC Controller
Constant Frequency Current Mode Step-Up DC/DC Controller in ThinSOT With Burst Mode Operation for Higher Efficiency at Light
SENSE
Synchronous Current Mode DC/DC Step-Up Controller
CERAMIC
LTC1872B 2.7V to 9.8V Input to 3.3V/1.2A Output SEPIC Converter
0.1 F
220pF
–2.5V
U
C
80.6k
C1
V
R
IN
f2
R
10k
C1
C
C
L1: BH ELECTRONICS 511-1012
M1: IRLMS2002
R
LTC1872B – 2.5V to 3.3V/0.5A Boost Converter
+
IN
O1
CS
R
252k
1
2
3
, CS; TOKO, MURATA OR TAIYO YUDEN
C1, C2: AVX TPSE107M010R0100
D1: MOTOROLA MBR2045CT
L1: COILTRONICS UP2B-4R7
f1
: PANASONIC EEFUE0G181R
: DALE OR IRC
220pF
I
GND
V
TH
C1
100 F
10V
FB
/RUN
LTC1872B
SENSE
NGATE
10k
V
IN
–
5
4
6
1
2
3
I
GND
V
TH
FB
/RUN
LTC1872B
L1A
SENSE
M1
NGATE
R
0.03
CS
V
M1: Si9804DV
R1: DALE 0.25W
U1: PANASONIC 2SB709A
L1B
IN
–
FOR V
R
C
SP TYPE CAPACITOR
5
4
6
O1
f1
MBRM120
TO 427k AND
TO 150 F, 6V PANASONIC
CS
4.7 F
10V
OUT
D1
= 5V CHANGE
M1 D1
R1
0.034
L1
4.7 H
+
COMMENTS
120 A Quiescent Current, 1.5V V
30 A Quiescent Current, V
Internally Compensated, V
8-Lead MSOP Package, 1.9V V
Operation Up to 60V, Fixed Frequency Current Mode
8-Pin N-Channel Drive, 3.5V V
20 A Quiescent Current, V
95% Efficient, 0.9V V
V
Load Current
10-Lead MSOP Package, 0.5V V
U1
C
10 F
10V, X5R
C
180 F
4V, SP
IN
IN
O1
+
2.5V to 9.8V, I
C2
2 100 F
10V
332k
80.6k
1872B TA05
V
2.7V TO 9.8V
V
3.3V/1.2A
1872B TA03
IN
OUT
180k
V
3.3V
0.5A
OUT
OUT
up to 4A, ThinSOT Package
LINEAR TECHNOLOGY CORPORATION 2001
IN
1872bf LT/TP 0601 2K • PRINTED IN USA
IN
IN
IN
5V, 550kHz Operation
Down to 1V
Down to 1V
Down to 1V
IN
IN
IN
IN
36V
18V
5V
8V