Datasheet

LTC3418
2
3418fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
The l indicates specifi cations which apply over the full operating
temperature range, otherwise speci cations are at T
A
= 25°C. V
IN
= 3.3V. (Note 2)
(Note 1)
Input Supply Voltage ...................................0.3V to 6V
I
TH
, RUN/SS, V
FB
Voltages ......................... 0.3V to V
IN
SYNC/MODE Voltages ................................ 0.3V to V
IN
TRACK Voltage ........................................... 0.3V to V
IN
SW Voltage .................................. –0.3V to (V
IN
+ 0.3V)
Operating Temperature Range
(Note 2) ...............................................40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range ..................65°C to 125°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range 2.25 5.5 V
V
FB
Regulated Feedback Voltage C ≤ T
A
≤ 85°C
(Note 3)
l
0.792
0.784
0.800
0.800
0.808
0.816
V
V
I
FB
Feedback Input Current 100 200 nA
ΔV
FB
Reference Voltage Line Regulation V
IN
= 2.5V to 5.5V (Note 3) 0.04 0.2 %/V
V
LOADREG
Output Voltage Load Regulation Measured in Servo Loop, V
ITH
= 0.36V
Measured in Servo Loop, V
ITH
= 0.84V
l
l
0.02
–0.02
0.2
–0.2
%
%
V
TRACK
Tracking Voltage Offset V
TRACK
= 0.4V 15 mV
Tracking Voltage Range
00.8V
13 14 15 16
TOP VIEW
39
UHF PACKAGE
38-LEAD (7mm × 5mm) PLASTIC QFN
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1SW
SW
PV
IN
PV
IN
PGOOD
R
T
RUN/SS
SGND
PV
IN
PV
IN
SW
SW
SW
SW
PV
IN
PV
IN
SYNC/MODE
I
TH
V
FB
SV
IN
PV
IN
PV
IN
SW
SW
PGND
PGND
PGND
TRACK
PGND
PGND
PGND
PGND
PGND
PGND
V
REF
PGND
PGND
PGND
23
22
21
20
9
10
11
12
T
JMAX
= 125°C, θ
JA
= 34°C/W, θ
JC
= 1°C/W
EXPOSED PAD (PIN 39) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3418EUHF#PBF LTC3418EUHF#TRPBF 3418 38-Lead (7mm × 5mm) Plastic QFN 40°C to 85°C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel speci cations, go to:
http://www.linear.com/tapeandreel/