LM5010
www.ti.com
SNVS307F –SEPTEMBER 2004–REVISED FEBRUARY 2013
High-Voltage 1-A Step-Down Switching Regulator
Check for Samples: LM5010
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FEATURES
APPLICATIONS
2
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Input Voltage Range: 8V to 75V
Valley Current Limit At 1.25A
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High Efficiency Point-Of-Load (POL) Regulator
Non-Isolated Telecommunications Buck
Regulator
Switching Frequency Can Exceed 1 MHz
Integrated N-Channel Buck Switch
Integrated Startup Regulator
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Secondary High Voltage Post Regulator
Automotive Systems
No Loop Compensation Required
Ultra-Fast Transient Response
DESCRIPTION
The LM5010 Step Down Switching Regulator features
all the functions needed to implement a low cost,
efficient, buck bias regulator capable of supplying in
excess of 1A load current. This high voltage regulator
contains an N-Channel Buck Switch, and is available
in thermally enhanced 10-pin WSON and 14-pin
HTSSOP packages. The hysteretic regulation
scheme requires no loop compensation, results in
fast load transient response, and simplifies circuit
implementation. The operating frequency remains
constant with line and load variations due to the
inverse relationship between the input voltage and
the on-time. The valley current limit detection is set at
1.25A. Additional features include: VCC under-voltage
lockout, thermal shutdown, gate drive under-voltage
lockout, and maximum duty cycle limiter.
Operating Frequency Remains Constant With
Load and Line Variations
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Maximum Duty Cycle Limited During Startup
Adjustable Output Voltage
Precision 2.5V Feedback Reference
Thermal shutdown
Packages
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10-Pin WSON (4 mm x 4 mm)
14-Pin HTSSOP
Both Packages Have Exposed Thermal Pad
For Improved Heat Dissipation
DEVICE INFORMATION
8V - 75V
Input
V
CC
V
IN
C3
C1
R
ON
LM5010
BST
C4
L1
R
ON
/ SD
V
OUT
SHUTDOWN
SW
D1
R1
R2
C2
SS
I
SEN
C6
FB
RTN
S
GND
Figure 1. Basic Step-Down Regulator
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PRODUCTION DATA information is current as of publication date.
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