lt3480emse-trpbf Linear Technology Corporation, lt3480emse-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt3480emse-trpbf
• Description: 38v, 2a, 2.4mhz Step-down Switching Regulator With 70?a Quiescent Current
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
range, otherwise specifi cations are at T
PARAMETER
Quiescent Current from V
Quiescent Current from BD
Minimum Bias Voltage (BD Pin)
Feedback Voltage
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Error Amp g
Error Amp Gain
V
V
V
V
Switching Frequency
Minimum Switch Off-Time
Switch Current Limit
Switch V
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Threshold Offset from Feedback Voltage
PG Hysteresis
PG Leakage
PG Sink Current
SYNC Low Threshold
SYNC High Threshold
SYNC Pin Bias Current
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 LT3480E 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. The LT3480I specifi cations are
guaranteed over the –40°C to 125°C temperature range.
C
C
C
C
Source Current
Sink Current
Pin to Switch Current Gain
Clamp Voltage
CESAT
m
IN
A
= 25°C. V
IN
CONDITIONS
V
V
V
V
V
V
V
4V < V
R
R
R
Duty Cycle = 5%
I
V
I
V
V
V
V
V
SW
SW
RUN/SS
BD
BD
RUN/SS
BD
BD
FB
T
T
T
SW
RUN/SS
FB
PG
PG
SYNC
= 10V , V
= 8.66k
= 29.4k
= 187k
= 0.8V, V
= 2A
= 1A
Rising
= 3V, Not Switching
= 0, Not Switching
= 3V, Not Switching
= 0, Not Switching
= 5V
= 0.4V
= 10V, V
IN
= 0V
= 0.2V
= 0.2V
= 2.5V
< 36V
RUN/SS
The
C
BD
= 0.4V
= 0V
l
= 10V , V
denotes the specifi cations which apply over the full operating temperature
Note 3: Bias current fl ows out of the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 5: Absolute Maximum Voltage at V
nonrepetitive 1 second transients, and 40V for continious operation.
BOOST
= 15V , V
BD
= 3.3V unless otherwise noted. (Note 2)
l
l
l
l
l
l
l
MIN
780
775
160
100
2.1
0.9
0.2
0.5
3
IN
and RUN/SS pins is 60V for
0.002
1000
0.01
0.01
0.02
TYP
105
790
790
400
200
500
100
600
2.7
3.5
2.4
3.5
1.5
0.1
0.1
30
80
45
45
60
22
12
1
7
2
1
5
LT3480
MAX
0.01
1.15
100
160
120
800
805
240
150
0.5
0.5
2.7
2.1
2.5
0.7
30
35
10
5
3
4
2
1
UNITS
μMho
3480fb
3
MHz
MHz
%/V
kHz
A/V
mV
mV
mV
mA
mV
mV
μA
μA
μA
μA
μA
μA
nA
μA
μA
nS
μA
μA
μA
μA
μA
V
V
A
V
V
V
V
V