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| LTM8021 Datasheet, PDF (3/16 Pages) Linear Technology – 36VIN, 500mA Step-Down DC/DC μModule | |||
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LTM8021
ELECTRICAL CHARACTERISTICS The l denotes the speciï¬cations which apply over the full operating temp-
erature range, otherwise speciï¬cations are at TA = 25°C, VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RADJ = 31.6k.
SYMBOL
VOUT(DC)
PARAMETER
DC Output Voltage
VOUT(AC_RMS) Output Voltage Ripple (RMS)
fSW
IOSC
IISC
ADJ
VBIAS(MIN)
IADJ
IRUN/SS
VIH(RUN/SS)
VIL(RUN/SS)
RFB
Switching Frequency
Short-Circuit Output Current
Short-Circuit Input Current
Voltage at ADJ Pin
Minimum BIAS Voltage for Proper
Operation
Current Out of ADJ Pin
RUN/SS Pin Current
RUN/SS Input High Voltage
RUN/SS Input Low Voltage
Internal Feedback Resistor
CONDITIONS
VIN = 24V, 0 ⤠IOUT ⤠500mA
RADJ = 31.6k, 0.1%
VIN = 24V, IOUT = 250mA
COUT = 2.2μF, VBIAS = VOUT
IOUT = 500mA
VIN = 36V, VBIAS = VOUT = 0V
VIN = 36V, VBIAS = VOUT = 0V
RADJ Open
IOUT = 500mA
VOUT = 5V, VADJ = 0V, RUN/SS = 0V
VRUN/SS = 2.5V, RADJ Open
RADJ Open, IOUT = 500mA
RADJ Open, IOUT = 500mA
RUN/SS = VBIAS = VADJ = 0V
MIN TYP MAX UNITS
3.3
V
1
mV
0.9
1.1
1.3
MHz
900
mA
25
mA
l 0.79 0.80 0.83
V
2.2
3
V
50
μA
23
μA
1.6
V
0.5
V
100
kΩ
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 LTM8021E is guaranteed to meet performance speciï¬cations
from 0°C to 125°C internal. Speciï¬cations over the full â40°C to 125°C
internal operating temperature range are assured by design, characteriza-
tion and correlation with statistical process controls. The LTM8021I is
guaranteed to meet speciï¬cations over the full â40°C to 125°C internal
operating temperature range. Note that the maximum internal temperature
is determined by speciï¬c operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.
Note 3: Guaranteed by design.
8021fb
3
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