ltc3770 Linear Technology Corporation, ltc3770 Datasheet - Page 2

• Manufacturer Part Number: ltc3770
• Description: Fast No Rsense Step-down Synchronous Controller With Margining, Tracking And Pll
• Manufacturer: Linear Technology Corporation

PACKAGE/ORDER I FOR ATIO
LTC3770
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (V
Boosted Topside Driver Supply Voltage
SENSE
DRV
V
PLLFLTR, I
TRACK/SS, FCB, Z0, Z1, Z2, RUN, PLLIN, MARGIN0,
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
ON
ORDER PART NUMBER
(BOOST) ................................................38V to – 0.3V
MARGIN1 Voltages ............... INTV
, V
CC
RNG
, (BOOST – SW) Voltages .................7V to – 0.3V
+
, SW Voltage ....................................32V to – 5V
LTC3770EG
, PGOOD Voltages .... INTV
TH
TRACK/SS
, V
MARGIN1
MARGIN0
V
PGOOD
REFOUT
V
MPGM
SGND
FB
V
REFIN
RUN
V
RNG
V
I
I
, V
ON
ON
W
TH
FB
T
http://www.linear.com/leadfree/
JMAX
REFIN
28-LEAD PLASTIC SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125°C, θ
IN
G PACKAGE
TOP VIEW
, V
Voltages ..........2.7V to – 0.3V
W W
INSNS
JA
= 130°C/ W
U
) ............32V to – 0.3V
G PART MARKING
28
27
26
25
24
23
22
21
20
19
18
17
16
15
FCB
Z0
BOOST
TG
SW
PGND
BG
INTV
Z2
Z1
ZV
V
PLLIN
PLLFLTR
LTC3770EG
CC
CC
IN
IN
W
+ 0.3V to – 0.3V
+ 0.3V to – 0.3V
CC
U
U
INTV
TG, BG, INTV
TG, BG, INTV
Operating Ambient Temperature
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
QFN Reflow Peak Body Temperature .................... 245°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART NUMBER
Range (Note 4) ................................... – 40°C to 85°C
CC
LTC3770EUH
, ZV
MARGIN1
MARGIN0
V
SGND
IN
V
REFIN
RNG
V
I
I
ON
CC
CC
TH
FB
Voltages .................................7V to – 0.3V
1
2
3
4
5
6
7
8
Peak Currents................................... 4A
RMS Currents ............................. 50mA
32-LEAD (5mm × 5mm) PLASTIC QFN
MUST BE SOLDERED TO THE PCB
32 31 30 29 28 27 26 25
EXPOSED PAD IS SGND (PIN 33)
9 10 11 12
T
JMAX
= 125°C, θ
UH PACKAGE
TOP VIEW
33
13
JA
= 34°C/ W
14 15 16
UH PART MARKING
3770
24
23
22
21
20
19
18
17
SENSE
SENSE
PGND
BG
DRV
INTV
Z2
Z1
CC
CC
+
–
3770fb