LTC3770 Datasheet, PDF (24/24 Pages) Linear Technology – Synchronous Controller with Margining, Tracking and PLL

LTC3770
TYPICAL APPLICATIO
Typical Application 2.5V/10A Synchronized at 450kHz
R_PG
100k
PGOOD
RUN
R4
39k
R3
11k
C_F
220pF
FCB
R7
47k
R_RUN
51k
R8
51k
32 31 30 29 28 27 26 25
PGOOD V_ON RUN FCB Z0 BOOST TG SW
R2
95.3k
R1
30.1k
R_C
10k
MARGIN1
MARGIN0
CC2
100pF
R_ON
75k
CC1
1000pF
R5
10k
1 _VRNG
2 _VFB
3 _ITH
4
SGND
5
MARGIN1
6
MARGIN0
7
I_ON
8
V_REFIN
LTC3770EUH
SENSE+ ²⁴
SENSE– ²³
PGND ²²
21
BG
DRV_CC ²⁰
INTV_CC ¹⁹
Z2 ¹⁸
17
Z1
V_REFOUT MPGM TRACK/SS PLLFLTR PLLIN V_IN V_INSNS ZV_IN
9
10
11
12
13 14 15 16
R6 C_SS
82k 0.1µF
R_PL
PLLIN
10k
0.1µF
C_PL
0.01µF
C_P
1000pF
CV_IN
0.01µF
1000pF
RV_IN
10Ω
L1: BI TECH 1.8µH HM65-H1R8-TB
M1, M2: PHILIPS PH3230
C_IN: TDK C4532X5R1H685M
C_OUT: PANASONIC EEFUE0G181R
M1
PH3230
V_IN
5V TO 28V
CB
0.22µF
L1
1.8µH
DB
D1
CMDSH-3 B340A
V_OUT
2.5V
10A
M2
PH3230
INTV_CC
CV_CC
10µF
+
C_OUT
180µF
4V
x2
C_OUT3
22µF
X5R
x2
C_IN
10µF
50V
x3
3770 TA02b
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3770f
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT/TP 1104 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004