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LTC3823IGNPBF Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3823IGNPBF
Description  Fast No RSENSE Step-Down Synchronous DC/DC Controller with Differential Output Sensing, Tracking and PLL
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3823IGNPBF Datasheet(HTML) 4 Page - Linear Technology

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LTC3823
4
3823fd
Current Sense Threshold
vs ITH Voltage
On-Time vs ION Current
On-Time vs VON Voltage
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Output
ΔVFBH
PGOOD Upper Threshold
VFB Rising
8
11
14
%
ΔVFBL
PGOOD Lower Threshold
VFB Falling
–8
–11
–14
%
ΔVFB(HYS)
PGOOD Hysteresis
VFB Returning
1.5
3
%
VPGL
PGOOD Low Voltage
IPGOOD = 5mA
0.15
0.4
V
Differential Sensing Amplifier
ADA
Gain
l
0.9965
1.000
1.0035
V/V
RIN
Input Resistance
Measured at VOUTSENSE+ Input
80
kΩ
VOS
Input Offset Voltage
VOUTSENSE+ = VDIFFOUT = 1.5V,
IDIFFOUT = 1mA
2mV
PSRROA
Power Supply Rejection Ratio
6V < VIN < 30V
90
dB
ICL
Maximum Output Current
3mA
VOUT(MAX)
Maximum Output Voltage
IDIFFOUT = 300μA
l
3.775
4
V
GBW
Gain Bandwidth Product
IDIFFOUT = 1mA
3.5
MHz
Thermal Shutdown
TSD
Shutdown Temperature
Rising
170
°C
THYST
Thermal Hysteresis
15
°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise specified.
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: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC3823GN: TJ = TA + (PD • 80°C/W)
LTC3823UH: TJ = TA + (PD • 34°C/W)
Note 3: The LTC3823 is tested in a feedback loop that servos VFB to
achieve a specified error amplifier output voltage (ITH).
Note 4: The LTC3823E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3823I is guaranteed over the full
–40°C to 85°C operating temperature range.
ITH VOLTAGE (V)
0
–150
–100
0
50
100
1
2
2.5
300
2823 G01
–50
0.5
1.5
150
200
250
VRNG = 2V
1.4V
1V
0.7V
0.5V
ION CURRENT (μA)
10
100
1000
10000
20
40
60
80
3823 G02
100
10
030
50
70
90
VON = 0V
VON VOLTAGE (V)
0
800
700
600
500
400
300
200
100
0
4
3823 G03
123
5
3.5
0.5
1.5
2.5
4.5
IION = 60μA
TYPICAL PERFORMANCE CHARACTERISTICS



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