Linear Technology LTC3729, Руководство пользователя, Страница: 2 / 28

2
LTC3729
sn3729 3729fas
ORDER PART
NUMBER
LTC3729EG
ABSOLUTE AXI U RATI GS
W W W U
PACKAGE/ORDER I FOR ATIO
U U W
T
JMAX
= 125
°
C,
θ
JA
= 95
°
C/W
(Note 1)
Input Supply Voltage (V
IN
).........................36V to – 0.3V
Topside Driver Voltages (BOOST1,2) .........42V to – 0.3V
Switch Voltage (SW1, 2) .............................36V to – 5 V
SENSE1
+
, SENSE2
+
, SENSE1
–
,
SENSE2
–
Voltages ........................ (1.1)INTV
CC
to – 0.3V
EAIN, V
OS
+
, V
OS
–
, EXTV
CC
, INTV
CC
,
RUN/SS, PGOOD Voltages ...........................7V to – 0.3V
Boosted Driver Voltage (BOOST-SW) .......... 7V to – 0.3V
PLLFLTR, PLLIN, CLKOUT, PHASMD,
V
DIFFOUT
Voltages ................................ INTV
CC
to – 0.3V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
G PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RUN/SS
SENSE1
+
SENSE1
–
EAIN
PLLFLTR
PLLIN
PHASMD
I
TH
SGND
V
DIFFOUT
V
OS
–
V
OS
+
SENSE2
–
SENSE2
+
CLKOUT
TG1
SW1
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
PGOOD
I
TH
Voltage ................................................ 2.7V to – 0.3V
Peak Output Current <1
µ
s(TGL1,2, BG1,2) ................ 5A
INTV
CC
RMS Output Current ................................ 50mA
Operating Ambient Temperature
Range (Note 6) ................................... – 40
°
C to 85
°
C
Junction Temperature (Note 2) ............................. 125
°
C
Storage Temperature Range ................. – 65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)
(G Package Only) .................................................. 300
°
C
32 31 30 29 28 27 26 25
9 10 11 12 13
TOP VIEW
UH PACKAGE
32-LEAD 5mm
×
5mm PLASTIC QFN
14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1 EAIN
PLLFLTR
PLLIN
PHASMD
I
TH
SGND
V
DIFFOUT
V
OS
–
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
NC SENSE1
–
SENSE1
+
NC RUN/SS CLKOUT TG1 SW1
V
OS
+
NC
SENSE2
–
SENSE2
+
PGOOD
TG2
SW2
NC
ORDER PART
NUMBER
LTC3729EUH
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 15V, V
RUN/SS
= 5V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
V
EAIN
Regulated Feedback Voltage (Note 3); I
TH
Voltage = 1.2V ● 0.792 0.800 0.808 V
V
SENSEMAX
Maximum Current Sense Threshold V
SENSE
–
= 5V ● 62 75 88 mV
V
SENSE1, 2
= 5V 65 75 85 mV
I
INEAIN
Feedback Current (Note 3) – 5 – 50 nA
V
LOADREG
Output Voltage Load Regulation (Note 3)
Measured in Servo Loop; I
TH
Voltage = 0.7V ● 0.1 0.5 %
Measured in Servo Loop; I
TH
Voltage = 2V
●
– 0.1 – 0.5 %
Consult LTC Marketing for parts specified with wider operating temperature ranges.
θ
JA
= 34
°
C/W
EXPOSED PAD IS SGND
(MUST BE SOLDERED TO PCB)
UH PART
MARKING
3729