LTC1872ES6 LINER [Linear Technology], LTC1872ES6 Datasheet - Page 12

• Manufacturer Part Number: LTC1872ES6
• Description: Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23
• Manufacturer: LINER [Linear Technology]

RELATED PARTS
CERAMIC
PACKAGE
LTC1872
PART NUMBER
LT1304
LT1610
LT1613
LT1619
LT1680
LTC1624
LT1615
LTC1700
LTC1772
LTC3401/LTC3402
12
TYPICAL APPLICATIO
0.1 F
–2.5V
V
IN
LTC1872 – 2.5V to 3.3V/0.5A Boost Converter
+
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
C1, C2: AVX TPSE107M010R0100
D1: MOTOROLA MBR2045CT
L1: COILTRONICS UP2B-4R7
220pF
C1
100 F
10V
(0.014 – 0.022)
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DIMENSIONS ARE INCLUSIVE OF PLATING
3. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
4. MOLD FLASH SHALL NOT EXCEED 0.254mm
5. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ)
0.35 – 0.55
10k
DESCRIPTION
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 SOT-23
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 SOT-23
No R
Constant Frequency Current Mode Step-Down DC/DC Controller
1A/2A, 3MHz Micropower Synchronous Boost Converter
1
2
3
I
GND
V
SENSE
TH
FB
/RUN
LTC1872
(0.059 – 0.069)
(0.110 – 0.118)
SENSE
1.50 – 1.75
NGATE
Synchronous Current Mode DC/DC Step-Up Controller
2.6 – 3.0
V
M1: Si9804DV
R1: DALE 0.25W
U1: PANASONIC 2SB709A
IN
–
5
4
6
U
(0.004 – 0.008)
0.09 – 0.20
(NOTE 2)
U
M1 D1
R1
0.034
L1
4.7 H
Dimensions in inches (millimeters) unless otherwise noted.
U1
(0.00 – 0.006)
0.00 – 0.15
+
C2
2 100 F
10V
332k
80.6k
SIX PLACES (NOTE 2)
(LTC DWG # 05-08-1634)
6-Lead Plastic SOT-23
1872 TA03
(0.014 – 0.020)
0.35 – 0.50
180k
S6 Package
V
3.3V
0.5A
OUT
(0.035 – 0.057)
(0.035 – 0.051)
220pF
0.90 – 1.45
0.90 – 1.30
C
80.6k
C1
R
f2
R
10k
C1
C
C
L1: BH ELECTRONICS 511-1012
M1: IRLMS2002
R
IN
01
CS
R
252k
1
2
3
, CS; TOKO, MURATA OR TAIYO YUDEN
: PANASONIC EEFUE0G181R
f1
: DALE OR IRC
I
GND
V
TH
FB
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
10-Lead MSOP Package, 0.5V V
to 3.3V/1.2A Output SEPIC Converter
/RUN
LTC1872
IN
(0.074)
1.90
REF
2.5V to 9.8V, I
SENSE
NGATE
LTC1872 2.7V to 9.8V Input
V
IN
–
5
4
6
L1A
OUT
M1
R
0.03
CS
(0.037)
up to 4A, SOT-23 Package
LINEAR TECHNOLOGY CORPORATION 2000
L1B
0.95
REF
IN
(0.110 – 0.118)
FOR V
R
C
SP TYPE CAPACITOR
2.80 – 3.00
f1
01
1872f LT/TP 0301 4K • PRINTED IN USA
(NOTE 3)
IN
IN
IN
MBRM120
TO 427k AND
TO 150 F, 6V PANASONIC
5V, 550kHz Operation
CS
4.7 F
10V
S6 SOT-23 0898
Down to 1V
Down to 1V
Down to 1V
OUT
D1
= 5V CHANGE
IN
IN
IN
+
IN
36V
18V
5V
C
10 F
10V, X5R
C01
180 F
4V, SP
IN
8V
1872 TA05
V
2.7V TO 9.8V
V
3.3V/1.2A
IN
OUT