DC/DC uModule. LTM8021 Datasheet

LTM8021 uModule. Datasheet pdf. Equivalent

LTM8021 Datasheet
Recommendation LTM8021 Datasheet
Part LTM8021
Description 500mA Step-Down DC/DC uModule
Feature LTM8021; LTM8021 36VIN, 500mA Step-Down DC/DC µModule Features n Complete Switch Mode Power Supply n Wide .
Manufacture Linear Technology
Datasheet
Download LTM8021 Datasheet




Linear Technology LTM8021
LTM8021
36VIN, 500mA
Step-Down DC/DC µModule
Features
n Complete Switch Mode Power Supply
n Wide Input Voltage Range: 3V to 36V
n 500mA Output Current
n 0.8V to 5V Output Voltage
n Fixed 1.1MHz Switching Frequency
n Current Mode Control
n (e4) RoHS Compliant Package with Gold
Pad Finish
n Programmable Soft-Start
n Tiny, Low Profile (11.25mm × 6.25mm × 2.82mm)
Surface Mount LGA Package
Applications
n Automotive Battery Regulation
n Power for Portable Products
n Distributed Supply Regulation
n Industrial Supplies
n Wall Transformer Regulation
Description
The LTM®8021 is a 36VIN 500mA, step-down DC/DC
µModule®. Included in the package are the switching
controller, power switches, inductor, and all support
components. Operating over an input voltage range of 3V
to 36V, the LTM8021 supports an output voltage range of
0.8V to 5V, set by a single resistor. Only an output and
bulk input capacitor are needed to finish the design.
The low profile package (2.82mm) enables utilization of
unused space on the bottom of PC boards for high den-
sity point of load regulation. A built-in soft-start timer is
adjustable with just a resistor and capacitor.
The LTM8021 is packaged in a thermally enhanced,
compact (11.25mm × 6.25mm) and low profile (2.82mm)
overmolded land grid array (LGA) package suitable
for automated assembly by standard surface mount
equipment. The LTM8021 is RoHS compliant.
L, LT, LTC, LTM, µModule, PolyPhase, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
7VIN to 36VIN, 5V/500mA µModule Regulator
VIN*
7V TO
36V
LTM8021
IN OUT
RUN/SS
BIAS
GND ADJ
1µF 19.1k
VOUT
5V AT 500mA
2.2µF
8021 TA01a
*RUNNING VOLTAGE RANGE. PLEASE REFER TO THE
APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS.
Efficiency and Power Loss
90
80
70
60
50
40
30
1.00
450
400
EFFICIENCY
350
300
250
200
POWER
LOSS
150
100
50
10.00
100.00
LOAD CURRENT (mA)
0
1000.00
8021 TA01b
For more information www.linear.com/LTM8021
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Linear Technology LTM8021
LTM8021
Absolute Maximum Ratings
(Note 1)
VIN, RUN/SS Voltage..................................................40V
RUN/SS Above VIN.......................................................3V
ADJ Voltage.................................................................5V
BIAS Voltage................................................................7V
VOUT Voltage..............................................................10V
Internal Operating Temperature
Range (Note 2)........................................ –40°C to 125°C
Maximum Solder Temperature............................... 260°C
Storage Temperature Range................... –55°C to 125°C
Pin Configuration
TOP VIEW
VIN 5
BANK 1
4
VOUT
BANK 2
ADJ
RUN/SS
3
2
1
BIAS
GND
BANK 3
ABCDE FGH
LGA PACKAGE
35-LEAD (11.25mm × 6.25mm × 2.82mm)
TJMAX = 125°C, θJA = 36.9°C/W, θJB = 20.9°C/W, WEIGHT = 0.49g
θJC(TOP) = 41.74°C/W, θJC(BOTTOM) = 17.8°C/W
order information
PART NUMBER
LTM8021EV#PBF
LTM8021IV#PBF
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
PART MARKING*
DEVICE
FINISH CODE
LTM8021V
e4
LTM8021V
e4
PACKAGE
TYPE
LGA
LGA
MSL
RATING
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
E lectrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RADJ = 31.6k.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VIN Input DC Voltage
VRUN/SS = 5V, RADJ = Open
3 36
VOUT
RADJ(MIN)
Output DC Voltage
Minimum Allowable RADJ
0
0
<
<
IIOOUUTT
<
<
500mA;
500mA;
RRAADDJJ
Open
= 19.1k,
0.1%
Note 3
0.8
5
18
ILK Leakage from IN to OUT
RUN/SS = VBIAS = 0V, RADJ Open
2.7 6
IOUT Continuous Output DC Current
5V ≤ VIN ≤ 36V, VBIAS = VOUT
0 500
IQ(VIN)
Quiescent Current into VIN
RUN/SS = 0.2V, VBIAS, RADJ Open
Not Switching
0.1 1
1.5 2.5
IQ(BIAS)
Quiescent Current into BIAS
Not Switching
0.15
∆VOUT/VOUT
∆VOUT/VOUT
Line Regulation
Load Regulation
5V ≤
RADJ
V=INOp≤e3n6V,
IOUT
=
500mA
VIN = 24V, 0 ≤ IOUT ≤ 500mA, VBIAS = VOUT
0.5
0.35
UNITS
V
V
V
kW
µA
mA
µA
mA
µA
%
%
8021fd
2 For more information www.linear.com/LTM8021



Linear Technology LTM8021
LTM8021
E lectrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications 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%
CVIONU=T =242V.2, µIOF,UVTB=IA2S5=0mVOAUT
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
900
25
l 0.79 0.80 0.83
2.2 3
MHz
mA
mA
V
V
50
23
1.6
0.5
100
µA
µA
V
V
kW
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 specifications
from 0°C to 125°C internal. Specifications over the full –40°C to 125°C
internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8021I is guaranteed to meet specifications over the full –40°C to
125°C internal operating temperature range. Note that the maximum
internal temperature is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
Note 3: Guaranteed by design.
For more information www.linear.com/LTM8021
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