LTC3602
3
3602fb
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 LTC3602E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: The LTC3602 is tested in a feedback loop that adjusts V
FB
to
achieve a specifi ed error amplifi er output voltage (I
TH
).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ΔV
PGOOD
Power Good Range ±10 ±12 %
R
PGOOD
Power Good Resistance 11 18 Ω
I
FB
FB Input Bias Current 10 nA
g
m
Transconductance Amplifi er g
m
1.7 ms
I
S
Supply Current
Active Mode
Sleep Mode
Shutdown
(Note 4)
500
75
0.2
700
100
1
μA
μA
μA
INTV
CC
V
CC
LDO Output Voltage 4.8 5 5.2 V
t
ON, MIN
Minimum Controllable ON-Time 90 ns
V
RUN
RUN Pin ON Threshold V
RUN
Rising
l
0.4 0.7 1 V
I
TRACK/SS
TRACK/SS Pull-Up Current 1.25 μA
f
OSC
Oscillator Frequency R
T
= 105k 0.8 1 1.2 MHz
f
SYNC
SYNC Capture Range 0.3 3 MHz
R
DS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
90
67
mΩ
mΩ
I
LIM
Peak Current Limit 3.8 4.5 5.2 A
I
LSW
Switch Leakage Current 0.1 1 μA
V
UVLO
INTV
CC
Undervoltage Lockout INTV
CC
Ramping Up 4.1 4.2 4.3 V
V
UVLO, HYS
INTV
CC
Undervoltage Lockout Hysteresis 700 mV
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 8.4V unless otherwise specifi ed.
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T
J
is calculated from the ambient temperature T
A
and the power
dissipation as follows: T
J
= T
A
+ (P
D
)(θ
JA
C/W).
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may impair device reliability.
Note 7: This limit indicates the current density limitations of the internal
metallization and it is not tested in production.
TYPICAL PERFORMANCE CHARACTERISTICS
Burst Mode Operation Load Step Transient Forced Continuous
10μs/DIV
OUTPUT
VOLTAGE
50mV/DIV
INDUCTOR
CURRENT
500mA/DIV
3602 G01
V
IN
= 7V
V
OUT
= 3.3V
LOAD = 50mA
10μs/DIV
OUTPUT
VOLTAGE
100mV/DIV
LOAD
CURRENT
1A/DIV
3602 G02
V
IN
= 7V
V
OUT
= 3.3V
