Datasheet

LTM4618
4
4618fa
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
HIGH
Highest Frequency V
FREQ
≥ 2.4V, INTV
CC
700 780 860 kHz
V
IH(MODE/PLLIN)
Synchronous Clock High Level 2.0 V
V
IL(MODE/PLLIN)
Synchronous Clock Low Level 0.8 V
R
MODE/PLLIN
MODE/PLLIN Input Resistance 250 k
I
FREQ
FREQ Pin
Sinking Current
Sourcing Current
f
MODE/PLLIN
> f
OSC
f
MODE/PLLIN
< f
OSC
–13
13
µA
µA
V
RUN
RUN Pin On Threshold RUN Rising 1.1 1.22 1.35 V
V
RUN
Hysteresis RUN Pin Hysteresis 120 mV
R
FBHI
Resistor Between V
OUT
and V
FB
Pins 60.1 60.4 60.7 kΩ
PGOOD Output
V
PGL
PGOOD Voltage Low I
PGOOD
= 2mA 0.1 0.3 V
I
PGOOD
PGOOD Leakage Current V
PGOOD
= 5V ±2 µA
V
PG
PGOOD Trip Level V
FB
with Respect to Set Regulated Voltage
V
FB
Ramping Negative
V
FB
Ramping Positive
–5
5
–7.5
7.5
–10
10
%
%
The l denotes the specifi cations which apply over the full internal
operating temperature range, otherwise specifi cations are at T
A
= 25°C (Note 2), V
IN
= 12V, per typical application in Figure 21.
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: The LTM4618 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTM4618E is guaranteed to meet performance specifi cations
over the 0°C to 125°C internal operating temperature range. Specifi cations
over the full –40°C to 125°C internal operating temperature range are
assured by design, characterization and correlation with statistical process
controls. The LTM4618I is guaranteed to meet specifi cations over the full
internal operating temperature range. Note that the maximum ambient
temperature consistent with these specifi cations is determined by specifi c
operating conditions in conjunction with board layout, the rated package
thermal resistance and other environmental factors.
Note 3: 100% tested at wafer level only.
Note 4: See Output Current Derating curves for different V
IN
, V
OUT
and T
A
.
Note 5: For input voltages less than 6V, tie the V
IN
, INTV
CC
and EXTV
CC
together. The LTM4618 will operate from 5V inputs, but V
IN
, INTV
CC
and
EXTV
CC
need to be tied together.