LTC3857IUH#TRPBF Linear Technology, LTC3857IUH#TRPBF Datasheet - Page 34

• 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
34
C
C
ITH2
ITH1A
115k
R
R
115k
R
60k
FREQ
A2
C
A1
1000pF
ITH1
200pF
1000pF
57.6k
28.7k
56pF
56pF
R
R
C
C
B1
B2
F1
F2
C
R
R
ITH2A
ITH1
ITH2
C
C
1nF
1nF
3.93k
SS1
SS2
3.93k
C1
200pF
C2
0.01μF
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 1V/1.2V Step-Down Converter
CC
LTC3857
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
TG2
BG2
V
CC
IN
100k INTV
100k
C
L1: SUMIDA CDEP105-0R4
L2: SUMIDA CDEP105-0R4
MTOP1, MTOP2: RENESAS RJK0305
MBOT1, MBOT2: RENESAS RJK0328
OUT1
, C
D1
D2
OUT2
CC
C
0.47μF
C
0.47μF
: SANYO 2R5TPE220M
B1
B2
C
4.7μF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22μF
0.47μH
0.47μH
IN
L1
L2
V
12V
IN
R
R
3.5mΩ
3.5mΩ
SENSE1
SENSE2
3857 TA05
C
220μF
×2
C
220μF
×2
OUT1
OUT2
V
1.2V
8A
V
1V
8A
OUT2
OUT1
3857fc