LT3481HDD Linear Technology, LT3481HDD Datasheet - Page 3

• Manufacturer Part Number: LT3481HDD
• Description: SW REG, 36V, 2A, 2.8MHZ, SD, 10DFN
• Manufacturer: Linear Technology

Specifications of LT3481HDD

• Primary Input Voltage: 34V
• No. Of Outputs: 1
• Output Voltage: 20V
• Output Current: 2A
• Voltage Regulator Case Style: DFN
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +150°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
noted. (Note 2)
PARAMETER
Minimum Input Voltage
Quiescent Current from V
Quiescent Current from BIAS
Minimum Bias Voltage
Feedback Voltage
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Error Amp GM
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
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 LT3481E 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 LT3481I specifi cations are
C
C
C
C
Source Current
Sink Current
Pin to Switch Current Gain
Clamp Voltage
CESAT
IN
CONDITIONS
V
V
V
V
V
V
V
4V < V
RT = 8.66k
RT = 29.4k
RT = 187k
Duty Cycle = 5%
I
V
I
V
V
V
V
SW
SW
RUN/SS
BIAS
BIAS
RUN/SS
BIAS
BIAS
FB
SW
RUN/SS
FB
PG
PG
= 1.25V, V
= 2A
= 1A
Rising
A
= 5V
= 3V
= 10V, V
= 3V, Not Switching
= 0, Not Switching
= 3V, Not Switching
= 0, Not Switching
= 25°C. V
IN
= 2.5V
= 0.2V
= 0.2V
< 34V
The
BIAS
C
= 0.4V
●
IN
= 0V
denotes the specifi cations which apply over the full operating
= 10V, V
guaranteed over the –40°C to 125°C temperature range. The LT3481H
specifi cations are guaranteed over the –40°C to 150°C operating
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: Bias current fl ows into the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed
to guarantee full saturation of the switch.
RUNS/SS
= 10V V
BOOST
= 15V, V
●
●
●
●
●
●
●
●
1.25
1.24
1.25
MIN
250
100
2.5
3.2
2.5
BIAS
= 3.3V unless otherwise
1.265
1.265
0.002
0.01
0.01
0.02
TYP
330
800
300
130
360
122
600
2.7
3.5
2.8
1.4
3.8
1.5
0.1
22
75
50
30
65
85
18
3
0
2
5
5
LT3481
MAX
1.29
0.02
1.55
120
120
100
350
200
3.6
0.5
0.5
1.3
3.1
4.4
2.1
0.2
60
35
10
5
3
2
1
UNITS
μMho
3481fb
3
MHz
MHz
%/V
kHz
A/V
mV
mA
mV
mV
μA
μA
μA
μA
μA
μA
nA
μA
μA
nS
μA
μA
μA
μA
V
V
V
V
V
A
V
V
V