LTC4261/LTC4261-2
31
42612fd
For more information www.linear.com/LTC4261
TYPICAL APPLICATION
PACKAGE DESCRIPTION
Using the LTC4261 and a Thermistor to Monitor Temperature
V
IN
LTC4261CGN
SDAO
SDAI
SCL
ADIN
100k AT 25°C
1%
VISHAY
NTCS0402E3104*HT
30.1k
1%
10k
1%
T (°C) = 38.05 • (V
ADIN
(V) – 0.1458), 20°C < T < 60°C
F
42612 TA02
–48V RTN
–48V INPUT
I
2
C
6 ×
0.51k IN SERIES
1/4W EACH
V
EE
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
.386 – .393*
(9.804 – 9.982)
GN28 REV B 0212
1 2
3
4
5
6
7
8 9 10 11 12
.229 – .244
(5.817 – 6.198)
.150 – .157**
(3.810 – 3.988)
202122232425262728
19
18
17
13 14
16
15
.016 – .050
(0.406 – 1.270)
.015 ±.004
(0.38 ±0.10)
× 45°
0° – 8° TYP
.0075 – .0098
(0.19 – 0.25)
.0532 – .0688
(1.35 – 1.75)
.008 – .012
(0.203 – 0.305)
TYP
.004 – .0098
(0.102 – 0.249)
.0250
(0.635)
BSC
.033
(0.838)
REF
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150 – .165
.0250 BSC.0165 ±.0015
.045 ±.005
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
INCHES
(MILLIMETERS)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE
GN Package
28-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641 Rev B)
LTC4261/LTC4261-2
32
42612fd
For more information www.linear.com/LTC4261
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
4.00 ±0.10
(2 SIDES)
5.00 ±0.10
(2 SIDES)
NOTE:
1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WXXX-X).
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
0.40 ±0.10
23 24
1
2
BOTTOM VIEW—EXPOSED PAD
0.75 ±0.05
R = 0.115
TYP
R = 0.05 TYP
PIN 1 NOTCH
R = 0.20 OR C = 0.35
0.25 ±0.05
0.50 BSC
0.200 REF
0.00 – 0.05
(UFD24) QFN 0506 REV A
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.70 ±0.05
0.25 ±0.05
0.50 BSC
2.65 ±0.05
2.00 REF
3.00 REF
4.10 ±0.05
5.50 ±0.05
3.10 ±0.05
4.50 ±0.05
PACKAGE OUTLINE
2.65 ±0.10
2.00 REF
3.00 REF
3.65 ±0.10
3.65 ±0.05
UFD Package
24-Lead Plastic QFN (4mm × 5mm)
(Reference LTC DWG # 05-08-1696 Rev A)
LTC4261/LTC4261-2
33
42612fd
For more information www.linear.com/LTC4261
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER
C 9/11 Change to Electrical Characteristics Gate Turn-Off Current
Update to Typical Performance Characteristics graph G06
Update to Pin Functions SDAI (Pin 5/Pin 2) description
Update to Block Diagram
Text changes to Operations section
Added Figure 3
Update to Figure 4
Text changes to Applications Information
Update to Typical Applications Figure 17
3
6
9
11
12
14
16
14, 17, 18, 22, 24
34
D 6/14 Separated V
EE
connection of LTC4261 and related components from –48V input plane in circuit figures
Added patent numbers
Changed delay conditions to GATE Open from C
GATE
= 1pF
Layout Considerations section: Added paragraph and Figure 10 on separating local V
EE
plane from -48V
input plane
1, 13, 20, 22, 27, 31, 34
1
3
23, 24
(Revision history begins at Rev C)

LTC4261CGN#PBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Neg V Hot Swap Cntrs w/ ADC & I2C Mon in
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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