LTC1840CGN Linear Technology, LTC1840CGN Datasheet - Page 11

• Manufacturer Part Number: LTC1840CGN
• Description: IC DUAL FAN CONTROLLER 16-SSOP
• Manufacturer: Linear Technology

Specifications of LTC1840CGN

• Applications: Fan Controller
• Number Of Outputs: 2
• Current - Output: 10mA
• Voltage - Supply: 2.7 V ~ 5.75 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Load: -

OPERATIO
PACKAGE DESCRIPTIO
Figure 1. Feedback Divider for 1.25V Reference
REGULATOR
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
(0.178 – 0.249)
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
0.007 – 0.0098
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
U
FB
1.25V
V
(5V TO 12V)
FB
V
OUT
(0.406 – 1.270)
R1
69.8k
R2
23.2k
0.016 – 0.050
I
DAC
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.
15(14)
*ADDITIONAL DETAILS
OMITTED FOR CLARITY
I
(I
DACOUTA
DACOUTB
LTC1840*
U
Figure 3. Series Diode to Avoid Beat Frequencies
16-Lead Plastic SSOP (Narrow .150 Inch)
)
0 – 8 TYP
0.015
(0.38
1840 F01
V
FAN 1, FAN 2: NMB 6820PL-04W-B49-D50
(Reference LTC DWG # 05-08-1641)
OUT
FAN 1
0.10)
0.004
GN Package
45
BYS10-25
(5.817 – 6.198)
(0.203 – 0.305)
0.008 – 0.012
0.229 – 0.244
1840 F03
(1.351 – 1.727)
0.053 – 0.068
FAN 2
Figure 2. Feedback Divider for 0.8V Reference
REGULATOR
16 15 14 13
1
2 3
FB
(4.801 – 4.978)
0.189 – 0.196*
4
0.8V
V
FB
12 11 10 9
(5V TO 12V)
1.3V
5 6 7
V
OUT
(0.635)
0.0250
BSC
R3
69.8k
R1
10k
R2
15k
I
DAC
(0.102 – 0.249)
0.004 – 0.0098
15(14)
8
*ADDITIONAL DETAILS
OMITTED FOR CLARITY
GN16 (SSOP) 1098
(3.810 – 3.988)
0.150 – 0.157**
I
(I
DACOUTA
DACOUTB
(0.229)
LTC1840*
0.009
REF
LTC1840
)
1840 F02
11
1840f