LTC3714_15 Datasheet, PDF (27/28 Pages) Linear Technology – Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp

LTC3714
Typical Application
Transmeta Crusoe™ Microprocessor Power Supply with Active Voltage Positioning
3.3V
2k
POWER GOOD
1µF
100Ω
10k
VRON
V_IN
1k
V_OUT
V_IN
DPSLP
BAT54C
START
3.3V
R22
100k
INTV_CC
200k
1M
0.1µF
0.01µF
1k
BAT54
3.2k
220pF ^20k
820pF
13k 1%
80.6k 1%
0.1µF _10k
1000pF
BAT54
330k
100pF
VID3
200k
VID2
U1
9 _VID2
10 _RUN/SS
11
V_ON
VID1 VID0
3.3V
VID1 ⁸
VID0 ⁷
BOOST ⁶
200k
200k
CMDSH-3
12 _PGOOD
13 _VRNG
TG ⁵
SW ⁴
0.22µF
SENSE ³
LTC3714EG
14 _ITH
2
PGND
19 _SGND
20 _FCB
21 _ION
22 _VFB
BG ¹
28
INTV_CC
V_IN ²⁷
4.7µF
1
V_IN
0.1µF
23
V_OSENSE
VID4 ²⁵
24 _VID3
EXTV_CC ²⁶ 5V
18
OPOUT
OP ^{+ 17}
3.3V
200k
VID4
15
OPV_IN
0.01µF
OP ^{– 16}
75k
1%
V_OUT
100k
453k
1%
1%
START
DPSLP
IRF7811
IRF7811
L1
1.8µH
+
C_IN
10F
35V
×2
C_OUT
270F
2V
×2
MBRS340
V_IN
5V TO 24V
V_OUT
0.6V TO 1.75V
8A
1µF
6.3V
0.005
3714 TA01
Package Description
5.20 – 5.38**
(.205 – .212)
G Package
28-Lead Plastic SSOP (5.3mm)
(Reference LTC DWG # 05-08-1640)
1.73 – 1.99
(.068 – .078)
10.07 – 10.33*
(.397 – .407)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0ϒ– 8ϒ
.13 – .22
(.005 – .009)
.55 – .95
(.022 – .037)
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
.65
(.0256)
BSC
2.
DIMENSIONS
ARE
IN
MILLIMETERS
(INCHES)
3. DRAWING NOT TO SCALE
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED .152mm (.006") PER SIDE
**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE
.25 – .38
(.010 – .015)
.05 – .21
(.002 – .008)
7.65 – 7.90
(.301 – .311)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
G28 SSOP 0501
Crusoe is a trademark of Transmeta Corporation.
3714f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
27