ltc3730 Linear Technology Corporation, ltc3730 Datasheet - Page 2

• Manufacturer Part Number: ltc3730
• Description: 3-phase, 5-bit Intel Mobile Vid, 600khz, Synchronous Buck Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
LTC3730
(Note 1)
Topside Driver Voltage (BOOST
Switch Voltage (SW
Boosted Driver Voltage (BOOST
Peak Output Current <1ms (TG
Supply Voltage (V
Pin Voltage Range ....................................... 7V to –0.3V
PLLIN, RUN/SS, PLLFLTR, FCB Voltages .. V
I
Operating Ambient Temperature Range ....... 0°C to 70°C
Junction Temperature (Notes 2, 7) ....................... 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
SYMBOL
Main Control Loop
V
V
I
V
V
g
g
V
I
V
UVR
temperature range, otherwise specifications are at T
2
MATCH
FCB
TH
m
mOL
REGULATED
SENSEMAX
LOADREG
REFLNREG
FCB
BINHIBIT
Voltage Range ..................................... 2.4V to –0.3V
PARAMETER
Regulated Voltage at IN
Maximum Current Sense Threshold
Maximum Current Threshold Match
Output Voltage Load Regulation
Output Voltage Line Regulation
Transconductance Amplifier g
Transconductance Amplifier GBW
Forced Continuous Threshold
FCB Bias Current
Burst Inhibit Threshold
Undervoltage RUN/SS Reset
CC
W
N
), PGOOD
) Range ........................ 32V to –5V
W W
+
N
N
N
, BG
) Range .. 38V to –0.3V
– SW
m
N
) ..................... 5A
N
) .... 7V to –0.3V
CONDITIONS
(Note 3); VID Code = 11111, V
V
V
Worst-Case Error at V
(Note 3)
Measured in Servo Loop, ∆I
Measured in Servo Loop, ∆I
V
I
I
V
Measured at FCB pin
V
TH
TH
EAIN
SENSE1
CC
FCB
CC
U
= 1.2V, Sink/Source 25µA (Note 3)
= 1.2V, (g
= 4.5V to 7V
Lowered Until the RUN/SS Pin is Pulled Low
CC
= 0.65V
A
= 0.5V, V
= 25°C. V
–
to –0.3V
,
V
SENSE2
The
m
ITH
• Z
●
–
L
Open,
CC
, Z
,
V
denotes the specifications which apply over the full operating
SENSE3
SENSE(MAX)
L
= V
= Series 1k-100kΩ-1nF)
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
RUN/SS
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
TH
TH
– = 0.6V, 1.8V
ITH
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
PLLFLTR
AMPOUT
RUN/SS
= 5V unless otherwise noted.
= 1.2V
PLLIN
SGND
VID1
EAIN
VID2
FCB
IN
IN
I
TH
+
–
+
–
+
–
–
+
T
JMAX
36-LEAD PLASTIC SSOP
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
= 125°C, θ
G PACKAGE
TOP VIEW
http://www.linear.com/leadfree/
JA
= 95°C/W
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
●
●
●
●
●
●
VID0
PGOOD
BOOST1
TG1
SW1
BOOST2
TG2
SW2
V
BG1
PGND
BG2
BG3
SW3
TG3
BOOST3
VID4
VID3
CC
V
CC
0.596
0.594
MIN
0.58
3.6
3.2
65
62
–5
– 1.5 V
U
CC
0.600
0.600
–0.1
0.03
0.60
TYP
0.2
3.8
75
75
0.1
5
3
– 0.7 V
ORDER PART
W
LTC3730CG
NUMBER
CC
0.604
0.606
MAX
–0.5
0.62
6.6
0.7
4.5
85
88
0.5
5
– 0.3
UNITS
mmho
U
3730fa
MHz
%/V
mV
mV
µA
%
%
%
V
V
V
V
V