ltc3890 Linear Technology Corporation, ltc3890 Datasheet - Page 36

• Manufacturer Part Number: ltc3890
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

RELATED PARTS
LTC3890
TYPICAL APPLICATION
PART NUMBER
LTC3857/LTC3857-1 Low I
LTC3858/LTC3858-1 Low I
LTC3868/LTC3868-1 Low I
LTC3834/LTC3834-1 Low I
LTC3835/LTC3835-1 Low I
LT3845
36
6.98k
C
C
R
ITH2
ITH1
A1
31.6k
R
41.2k
R
FREQ
1000pF
A2
470pF
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
C
C
C
SS2
ITH1A
SS1
C
100pF
ITH2A
0.01μF
0.01μF
100pF
100k
100k
R
R
R
R
34.8k
34.8k
B2
B1
DESCRIPTION
DC/DC Controllers with 99% Duty Cycle
DC/DC Controllers with 99% Duty Cycle
DC/DC Controller with 99% Duty Cycle
99% Duty Cycle
99% Duty Cycle
Low I
Controller
ITH1
ITH2
●
Q
Q
Q
Q
Q
Q
, Dual Output 2-Phase Synchronous Step-Down
, Dual Output 2-Phase Synchronous Step-Down
, Dual Output 2-Phase Synchronous Step-Down
, Synchronous Step-Down DC/DC Controller with
, Synchronous Step-Down DC/DC Controller with
, High Voltage Synchronous Step-Down DC/DC
FAX: [phone]
C1
1nF
C2
1nF
SENSE1
SENSE1
V
ITH1
TRACK/SS1
I
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
TRACK/SS2
ITH2
V
SENSE2
SENSE2
LIM
FB1
FB2
CC
LTC3890
+
–
–
+
High Effi ciency Dual 12V/3.3V Step-Down Converter
●
PGOOD1
PGOOD2
BOOST1
BOOST2
INTV
www.linear.com
PGND
SW1
SW2
BG1
TG1
BG2
TG2
V
CC
IN
100k
100k
C
B2
0.47μF
D1
D2
C
0.47μF
B1
INTV
C
4.7μF
CC
INT
COMMENTS
Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V
0.8V ≤ V
Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V
0.8V ≤ V
Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V
0.8V ≤ V
Phase-Lockable Fixed Frequency 140kHz to 650kHz, 4V ≤ V
0.8V ≤ V
Phase-Lockable Fixed Frequency 140kHz to 650kHz, 4V ≤ V
0.8V ≤ V
Adjustable Fixed Frequency 100kHz to 500kHz, 4V ≤ V
1.23V ≤ V
MBOT1
MTOP1
MTOP2
MBOT2
4.7μH
8μH
L1
L2
OUT
OUT
OUT
OUT
OUT
R
R
OUT
C
180μF
10mΩ
SENSE1
SENSE2
9mΩ
C
220μF
OUT1
IN
≤ 24V, I
≤ 24V, I
≤ 14V, I
≤ 10V, I
≤ 10V, I
≤ 36V, I
3890 TA06
Q
Q
Q
Q
Q
Q
V
12V
3A
V
12.5V TO 60V
= 50μA
= 170μA
= 170μA
= 30μA
= 80μA
OUT1
IN
= 120μA, TSSOP-16
C
470μF
V
3.3V
5A
OUT2
OUT2
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: COILCRAFT SER1360-802KL
L2: COILCRAFT SER1360-472KL
C
C
D1, D2: DFLS1100
OUT1
OUT2
© LINEAR TECHNOLOGY CORPORATION 2010
: 16SVP180MX
: SANYO 6TPE470M
LT 0210 • PRINTED IN USA
IN
≤ 60V,
IN
IN
IN
IN
IN
≤ 38V,
≤ 38V,
≤ 24V,
≤ 36V,
≤ 36V,
3890f