LM5010_15 Datasheet, PDF (1/26 Pages) Texas Instruments – High-Voltage 1-A Step-Down Switching Regulator

LM5010
www.ti.com
SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013
High-Voltage 1-A Step-Down Switching Regulator
Check for Samples: LM5010
FEATURES
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•2 Input Voltage Range: 8V to 75V
• Valley Current Limit At 1.25A
• Switching Frequency Can Exceed 1 MHz
• Integrated N-Channel Buck Switch
• Integrated Startup Regulator
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Operating Frequency Remains Constant With
Load and Line Variations
• Maximum Duty Cycle Limited During Startup
• Adjustable Output Voltage
• Precision 2.5V Feedback Reference
• Thermal shutdown
• Packages
– 10-Pin WSON (4 mm x 4 mm)
– 14-Pin HTSSOP
– Both Packages Have Exposed Thermal Pad
For Improved Heat Dissipation
APPLICATIONS
• High Efficiency Point-Of-Load (POL) Regulator
• Non-Isolated Telecommunications Buck
Regulator
• Secondary High Voltage Post Regulator
• Automotive Systems
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: V_CC under-voltage
lockout, thermal shutdown, gate drive under-voltage
lockout, and maximum duty cycle limiter.
DEVICE INFORMATION
8V - 75V
Input
C1
SHUTDOWN
V_IN
V_CC
R_ON
LM5010
BST
R_ON / SD
SW
SS
I_SEN
C6
FB
RTN
S_GND
C3
C4
L1
D1
R1
R2
V_OUT
C2
Figure 1. Basic Step-Down Regulator
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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