LTC3857IUH#TRPBF Linear Technology, LTC3857IUH#TRPBF Datasheet - Page 32

• Manufacturer Part Number: LTC3857IUH#TRPBF
• Description: IC CTRLR STP-DN SYNC DUAL 32QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3857IUH#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 24 V
• Frequency - Switching: 50kHz ~ 900kHz
• Voltage - Input: 4 ~ 38 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

LTC3857
TYPICAL APPLICATIONS
32
C
C
ITH1
ITH2
R
R
75k
R
34k
60k
FREQ
A2
A1
C
680pF
680pF
ITH1A
392k
475k
33pF
15pF
R
R
C
100pF
C
B1
B2
F1
F2
C
C
R
R
ITH2A
SS1
ITH1
ITH2
C
1nF
1nF
0.01μF
SS2
C1
100pF
C2
10k
17k
0.01μF
SENSE1
SENSE1
V
I
TRACK/SS1
I
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
TRACK/SS2
I
V
SENSE2
SENSE2
TH1
LIM
TH2
FB1
FB2
High Efficiency Dual 12V/5V Step-Down Converter
CC
LTC3857
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
TG2
BG2
V
CC
IN
C
C
L1: SUMIDA CDEP105-8R8M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
100k INTV
100k
OUT1
OUT2
: KEMET T525D476M016E035
: SANYO 10TPD150M
D1
D2
CC
C
0.47μF
C
0.47μF
B1
B2
C
4.7μF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22μF
IN
8.8μH
4.3μH
L1
L2
V
12.5V TO 38V
IN
R
R
SENSE1
9mΩ
SENSE2
6mΩ
3857 TA03
C
47μF
C
150μF
OUT1
OUT2
V
5V
5A
V
12V
3A
OUT2
OUT1
3857fc