LTC3617_15 Datasheet, PDF (2/20 Pages) Linear Technology – 6A Monolithic Synchronous Step-Down Regulator for DDR Termination

LTC3617
Absolute Maximum Ratings
(Note 1)
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
Pin Configuration
TOP VIEW
24 23 22 21
RT 1
SGND 2
VTTR 3
PV_IN 4
SW 5
SW 6
SW 7
SW 8
25
PGND
20 SYNC
19 RUN
18 SV_IN
17 PV_IN
16 SW
15 SW
14 SW
13 SW
9 10 11 12
UDD PACKAGE
24-LEAD (3mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 43°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
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
V_UVLO
V_OVLO
Input Voltage Operating Range
Undervoltage Lockout Threshold
Overvoltage Lockout Threshold
SV_IN Ramping Down
SV_IN Ramping Up
SV_IN Ramping Up
Hysteresis
l
2.25
l
1.7
l
6.5
250
5.5
V
V 
2.2
V
7
V
mV
VTTR
VTTR Output Voltage with Line and Load VDDQIN = 1.5V, Load = ±10mA l 0.49 • VDDQIN 0.5 • VDDQIN 0.51 • VDDQIN
V
Regulation
VTTR Maximum Output Current
±10
mA
V_FB
Feedback Voltage Accuracy
I_FB
Feedback Input Current
VDDQIN = 1.5V (Note 3)
V_FB = 0.75V
l VTTR – 10
VTTR
VTTR + 10
mV
l
±30
nA
3617fa
2