LTC3857IUH#TRPBF Linear Technology, LTC3857IUH#TRPBF Datasheet - Page 33

• 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: -

TYPICAL APPLICATIONS
C
C
ITH1A
ITH2
R
R
16.9k
75k
R
60k
FREQ
A2
A1
C
680pF
ITH1
100pF
680pF
392k
487k
18pF
15pF
R
R
C
C
B2
B1
F1
F2
C
R
R
ITH2A
ITH1
ITH2
C
C
1nF
SS1
SS2
1nF
C1
C2
46k
17k
100pF
0.01μF
0.01μF
V
I
TRACK/SS1
PLLIN/MODE
SGND
I
SENSE1
SENSE1
I
PHSMD
CLKOUT
EXTV
RUN1
RUN2
FREQ
TRACK/SS2
V
SENSE2
SENSE2
TH1
TH2
LIM
FB1
FB2
High Efficiency Dual 24V/5V Step-Down Converter
CC
LTC3857
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
BG2
TG2
V
CC
IN
C
L1: SUMIDA CDR7D43MN
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
100k
100k
OUT2
: SANYO 10TPD150M
INTV
D1
D2
CC
C
0.47μF
C
0.47μF
B1
B2
C
4.7μF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22μF
IN
4.3μH
22μH
L1
L2
V
28V TO 38V
IN
R
R
25mΩ
SENSE1
SENSE2
6mΩ
3857 TA04
C
22μF
×2
CERAMIC
C
150μF
OUT1
OUT2
LTC3857
V
5V
5A
V
24V
1A
OUT2
OUT1
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