LTC3738 Linear Technology, LTC3738 Datasheet - Page 2

• Manufacturer Part Number: LTC3738
• Description: 3-Phase Buck Controller
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
(Note 1)
LTC3738
Topside Driver Voltages (BOOST
Switch Voltage (SW
Boosted Driver Voltage (BOOST
Peak Output Current <1ms (TG
Supply Voltage (V
Pin Voltages ................................................ 7V to –0.3V
OUTEN, SS, PLLFLTR,
FCB/SYNC Voltages ................................... V
I
IN
AVP, SENSE
Operating Ambient Temperature Range ....... 0°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ..................–65°C to 125°C
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loop
V
V
I
V
V
g
g
V
I
2
MATCH
FCB
TH
m
mOL
REGULATED
SENSEMAX
LOADREG
REFLNREG
FCB
+
, IN
Voltage ................................................ 2.4V to –0.3V
–
, VID0-VID5, TSNS .............................. 5V to 0V
PARAMETER
Regulated Voltage at IN
Maximum Current Sense Threshold
Current Match
Output Voltage Load Regulation
Output Voltage Line Regulation
Transconductance Amplifier g
Transconductance Amplifier GBW
Forced Continuous Threshold
FCB Bias Current
+
, SENSE
CC
W
N
), PGOOD, VR_HOTB
)................................... 32V to –5V
–
.................................. 1.9V to 0V
W W
+
N
N
, BG
N
– SW
) ............ 38V to –0.3V
m
N
) ..................... 5A
N
) .... 7V to –0.3V
CONDITIONS
(Note 3); VID Code = 110101, V
V
V
Worst-Case Error at V
(Note 3)
Measured in Servo Loop, ∆I
Measured in Servo Loop, ∆I
V
I
I
V
TH
TH
EAIN
SENSE1
CC
FCB
U
= 1.2V, Sink/Source 25µA (Note 3)
= 1.2V, (g
= 4.5V to 7V
CC
= 0.65V
A
= 0.5V, V
= 25°C. V
–
to –0.3V
,
V
SENSE2
The
m
ITH
• Z
●
–
L
CC
Open,
, Z
,
denotes the specifications which apply over the full operating
V
= V
SENSE3
SENSE(MAX)
L
= Series 1k-100kΩ-1nF)
OUTEN
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TH
TH
– = 0.8V, 1.85V
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
ITH
= V
LTC3738CUHF
ORDER PART
= 1.2V
SS
FCB/SYNC
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
PLLFLTR
EXPOSED PAD (PIN 39) IS SGND MUST BE SOLDERED TO PCB
NUMBER
= 5V unless otherwise noted.
EAIN
AVP
IN
IN
–
+
+
–
+
–
–
+
10
11
12
1
2
3
4
5
6
7
8
9
38-LEAD (7mm × 5mm) PLASTIC QFN
T
38 37 36 35 34 33 32
13 14 15 16
JMAX
= 125°C, θ
UHF PACKAGE
●
●
●
●
●
TOP VIEW
39
1.166
1.163
JA
MIN
0.58
65
62
–5
17 18 19
= 34°C/W
U
UHF PART
1.175
1.175
MARKING
–0.1
0.03
3.05
0.60
TYP
1.5
0.2
75
75
0.1
3738
31
30
29
28
27
26
25
24
23
22
21
20
W
TG1
SW1
BOOST2
TG2
SW2
V
BG1
PGND
BG2
BG3
SW3
TG3
CC
1.184
1.187
MAX
–0.5
0.62
0.7
85
88
0.5
5
UNITS
mmho
U
MHz
%/V
3738f
mV
mV
µA
%
%
%
V
V
V