Datasheet
LTC3617
2
3617fa
absolute MaxiMuM ratings
PV
IN
, SV
IN
Voltages ..................................... –0.3V to 6V
SW Voltage ................................. –0.3V to (PV
IN
+ 0.3V)
ITH, RT, SYNC Voltages .............. –0.3V to (SV
IN
+ 0.3V)
VTTR, RUN, V
FB
Voltages ........... –0.3V to (SV
IN
+ 0.3V)
VDDQIN, PGOOD Voltages ........................... –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 8) ............................................ –40°C to 125°C
Storage Temperature.............................. –65°C to 150°C
(Note 1)
TOP VIEW
25
PGND
UDD PACKAGE
24-LEAD (3mm × 5mm) PLASTIC QFN
RT
SGND
VTTR
PV
IN
SW
SW
SW
SW
SYNC
RUN
SV
IN
PV
IN
SW
SW
SW
SW
NC
PV
IN
PV
IN
NC
VDDQIN
ITH
V
FB
PGOOD
6
5
4
3
2
1
7
8
15
16
17
18
19
20
14
13
9 10 11 12
24 23 22 21
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
pin conFiguration
orDer inForMation
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3617EUDD#PBF LTC3617EUDD#TRPBF LFXC
24-Lead (3mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3617IUDD#PBF LTC3617IUDD#TRPBF LFXC
24-Lead (3mm × 5mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
electrical characteristics
The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C. PV
IN
= SV
IN
= 3.3V, RT = SV
IN
unless otherwise specified (Notes 1, 2, 8).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Operating Range
l
2.25 5.5 V
V
UVLO
Undervoltage Lockout Threshold SV
IN
Ramping Down
SV
IN
Ramping Up
l
l
1.7
2.2
V
V
V
OVLO
Overvoltage Lockout Threshold SV
IN
Ramping Up
Hysteresis
6.5
250
7 V
mV
VTTR VTTR Output Voltage with Line and Load
Regulation
VDDQIN = 1.5V, Load = ±10mA
l
0.49 • VDDQIN 0.5 • VDDQIN 0.51 • VDDQIN V
VTTR Maximum Output Current ±10 mA
V
FB
Feedback Voltage Accuracy VDDQIN = 1.5V (Note 3)
l
VTTR – 10 VTTR VTTR + 10 mV
I
FB
Feedback Input Current V
FB
= 0.75V
l
±30 nA