LTC3626_15 Datasheet, PDF (4/28 Pages) Linear Technology – 20V, 2.5A Synchronous Monolithic Step-Down Regulator with Current and Temperature Monitoring

LTC3626
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 3). PV_IN = SV_IN = 12V unless otherwise specified.
SYMBOL
PARAMETER
PGOOD Good-to-Bad Threshold
PGOOD Bad-to-Good Threshold
R_PGOOD
t_SS
I_TRACK/SS
Power Good Filter Time
PGOOD Pull-Down Resistance
Switch Leakage Current
Internal Soft-Start Time
TRACK/SS Pull-Up Current
MODE Threshold Voltage
SYNC Threshold Voltage
MODE Input Current
CONDITIONS
FB Rising
FB Falling
FB Rising
FB Falling
10mA Load
V_RUN = 0V
V_FB from 10% to 90% Full Scale
MODE V_IH
MODE V_IL
SYNC V_IH
MODE = 0V
MODE = INTV_CC
MIN TYP
8
–8
–3
–5
3
5
20
40
20
0.01
400
1.4
l 1.0
l
l 1.4
–1.5
1.5
MAX UNITS
10
%
–10
%
%
%
μs
Ω
1
μA
700
μs
μA
V
0.4
V
V
μA
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Guaranteed by long term current density limitations.
Note 3: The LTC3626 is tested under pulsed load conditions such that
T_J ≈ T_A. The LTC3626E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization, and
correlation with statistical process controls. The LTC3626I is guaranteed
over the –40°C to 125°C operating junction temperature range. Note that
the maximum ambient temperature consistent with these specifications
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance, and other environmental
factors.
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 5: Output voltages above 6V are not optimized for controlled
on-time operation. Refer to the Applications Information section for
further discussions related to the output voltage range. Verified at test by
comparison of measured on-time to V_ON voltage.
Note 6: Tested in a proprietary test mode, where I_SW flows through the
synchronous switch only.
Note 7: Guaranteed by design.
Note 8: Maximum allowed current draw when used as a regulated output
is 5mA. This supply is only intended to supply additional DC load currents
as needed and not intended to regulate large transient or AC behavior as
these waveforms may impact LTC3626 operation.
3626fa
4
For more information www.linear.com/LTC3626