LTM8029_15 Datasheet, PDF (1/22 Pages) Linear Technology – 36VIN, 600mA Step-Down Module Converter with 5A Quiescent Current

Features
n _{Complete Switch Mode Power Supply}
n _{Low Quiescent Current Burst Mode}^® _Operation
5μA I_Q at 12V_IN to 3.3V_OUT
n _{600mA Output Current}
n _{Wide Input Voltage Range: 4.5V to 36V (40VMAX)}
n _{Output Voltage: 1.2V to 18V}
n _{Excellent Dropout Performance}
n _{Can Be Used As an Inverter}
n _{Adjustable Switching Frequency: 200kHz to 2.2MHz}
n _{Current Mode Control}
n _{SnPb or RoHS Compliant Finish}
n _{Tiny, Low Profile (11.25mm × 6.25mm × 3.42mm)}
Surface Mount BGA Package
Applications
n _{Automotive Battery Regulation}
n _{Power for Portable Products}
n _{Distributed Supply Regulation}
n _{Industrial Supplies}
n _{Wall Transformer Regulation}
LTM8029
36V_IN, 600mA Step-Down
µModule Converter with
5µA Quiescent Current
Description
The LTM^®8029 is a 36V_IN, 600mA step-down µModule^®
converter with 5µA quiescent current. It is an adjustable
frequency buck switching regulator that consumes only
5μA of quiescent current. The LTM8029 can accept an
input as high as 36V_IN and operates at low input voltages
due to its off-time skipping capability. Burst Mode opera-
tion maintains high efficiency at low output currents while
keeping the output ripple low. The RUN pin features an
accurate threshold and the shutdown current is 0.9μA.
A power good flag signals when V_OUT reaches 90% of the
programmed output voltage.
The LTM8029 is packaged in a thermally enhanced, com-
pact (11.25mm × 6.25mm) and low profile (3.42mm)
overmolded ball grid array (BGA) package. The LTM8029
is available with SnPb (BGA) or RoHS compliant terminal
finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
Low Quiescent Current, 5V_OUT, 600mA µModule Regulator
V_IN
5.6V TO 36V
LTM8029
V_IN
V_OUT
1µF
RUN
BIAS
PGOOD
RT GND FB
158k
309k
f = 800kHz
8029 TA01a
22µF
V_OUT
5V
600mA
Minimum Input Voltage vs Output Current
5.8
5.7
5.6
5.5
5.4
0
100 200 300 400 500 600
OUTPUT CURRENT (mA)
8029 TA01b
For more information www.linear.com/LTM8029
8029fc
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