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LT1534CS Datasheet(PDF) 3 Page - Linear Technology

Part # LT1534CS
Description  Ultralow Noise 2A Switching Regulators
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1534CS Datasheet(HTML) 3 Page - Linear Technology

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LT1534/LT1534-1
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 5V, VC = 0.9V, VFB = VREF. COL, SHDN, NFB, all other pins open
unless otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Error Amplifiers
VNFR
Negative Feedback Reference Voltage
Measured at Negative Feedback Pin with
q
– 2.550
– 2.500
– 2.420
V
Feedback Pin Open
INFR
Negative Feedback Input Current
VNFB = VNFR
q
–37
– 25
µA
NFBREG
Negative Feedback Reference Voltage
2.7V
≤ VIN ≤ 23V
q
0.002
0.05
%/V
Line Regulation
gm
Error Amplifier Transconductance
∆IC = ±25µA
1100
1500
1900
µmho
q
700
2300
µmho
IESK
Error Amplifier Sink Current
VFB = VREF + 150mV, VC = 0.9V, VSHDN = 1V
q
120
200
350
µA
IESRC
Error Amplifier Source Current
VFB = VREF – 150mV, VC = 0.9V, VSHDN = 1V
q
120
200
350
µA
VCLH
Error Amplifier Clamp Voltage
High Clamp, VFB = 1V
1.33
V
VCLL
Error Amplifier Clamp Voltage
Low Clamp, VFB = 1.5V
0.1
V
AV
Error Amplifier Voltage Gain
180
250
V/V
Oscillator and Sync
fMAX
Maximum Switch Frequency
250
kHz
fSYNC
Synchronization Frequency Range
fOSC = 250kHz
q
375
kHz
RSYNC
SYNC Pin Input Resistance
40
k
Ω
VFBfs
FB Pin Threshold for Frequency Shift
5% Reduction from Nominal
0.4
V
Output Switches
DCMAX
Maximum Switch Duty Cycle
RVSL = RCSL = 4.9k, fOSC = 25kHz
q
88
91
%
tIBL
Switch Current Limit Blanking Time
200
ns
BVCOL
Output Switch Breakdown Voltage
2.7V
≤ VIN ≤ 23V
q
35
V
RON
Output Switch-On Resistance
ICOL = 1.5A, Both COL Pins Tied Together
q
0.25
0.43
Ω
ILIM
Switch Current Limit
Duty Cycle = 30%
2
A
Duty Cycle = 80%
1.6
A
∆IIN/∆ISW Supply Current Increase During
16
mA/A
Switch-On Time
Slew Control
VSLEWR
Output Voltage Slew Rising Edge
RVSL, RCSL = 17k
11
V/
µs
VSLEWF
Output Voltage Slew Falling Edge
RVSL, RCSL = 17k
14.5
V/
µs
ISLEWR
Output Current Slew Rising Edge
RVSL, RCSL = 17k
1.3
A/
µs
ISLEWF
Output Current Slew Falling Edge
RVSL, RCSL = 17k
1.3
A/
µs



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