LTC3857IUH#PBF Linear Technology, LTC3857IUH#PBF Datasheet - Page 31

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

Specifications of LTC3857IUH#PBF

• 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
ITH2
68.1k
ITH1
R
68.1k
R
A2
A1
C
820pF
ITH1A
820pF
143k
22pF
215k
15pF
R
R
100pF
C
C
B1
C
B2
F1
F2
C
SS1
R
R
ITH2A
ITH1
ITH2
C
D1, D2: CENTRAL SEMI CMDSH-4E
L1: SUMIDA CDEP105-2R5
L2: SUMIDA CDEP105-3R2M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
0.01μF
C
OUT1
1nF
1nF
SS2
C1
150pF
C2
22k
15k
, C
0.01μF
OUT2
: SANYO 4TPE150M
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 2.5V/3.3V Step-Down Converter
CC
LTC3857
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
TG2
BG2
V
CC
IN
100k
100k
INTV
D1
D2
CC
C
0.47μF
C
0.47μF
B1
B2
C
4.7μF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22μF
IN
2.4μH
3.2μH
L1
L2
V
4.5V TO 38V
IN
R
R
SENSE1
SENSE2
6mΩ
6mΩ
3857 TA02
C
150μF
C
150μF
OUT1
OUT2
LTC3857
V
3.3V
5A
V
2.5V
5A
OUT2
OUT1
31
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