LM5007MM National Semiconductor, LM5007MM Datasheet

IC BUCK ADJ .5A 8MSOP

LM5007MM

Manufacturer Part Number
LM5007MM
Description
IC BUCK ADJ .5A 8MSOP
Manufacturer
National Semiconductor
Type
Step-Down (Buck)r
Datasheet

Specifications of LM5007MM

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
2.5 ~ 73 V
Current - Output
500mA
Frequency - Switching
800kHz
Voltage - Input
9 ~ 75 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
For Use With
LM5007EVAL - EVALUATION BOARD FOR LM5007
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

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© 2008 National Semiconductor Corporation
LM5007
High Voltage (80V) Step Down Switching Regulator
General Description
The LM5007 Step Down Switching Regulator features all of
the functions needed to implement low cost, efficient, Buck
bias regulators. This high voltage regulator contains an 80 V,
0.7A N-Channel Buck Switch. The device is easy to apply and
is provided in the MSOP-8 and the thermally enhanced LLP-8
packages. The regulator is based on a hysteretic control
scheme using an on time inversely proportional to V
feature allows the operating frequency to remain relatively
constant with load and input voltage variations. The hysteretic
control requires no control loop compensation, while provid-
ing very fast load transient response. An intelligent current
limit is implemented in the LM5007 with forced off time that is
inversely proportional to V
reduces load current foldback. Additional protection features
include: Thermal Shutdown, Vcc undervoltage lockout, gate
drive undervoltage lockout, and Max Duty Cycle limiter.
Connection Diagram
Ordering Information
Order Number
LM5007MMX
LM5007SDX
LM5007MM
LM5007SD
OUT
. This current limiting scheme
Package Type
MSOP-8
MSOP-8
200783
LLP-8
LLP-8
8-Lead MSOP, LLP
IN
. This
NSC Package Drawing
Features
Typical Applications
Package
Integrated 80V, 0.7A N-Channel Buck Switch
Internal HV Vcc Regulator
No Control Loop Compensation Required
Ultra-Fast Transient Response
On Time Varies Inversely with Line Voltage
Operating Frequency Nearly Constant with Varying Line
Voltage
Adjustable Output Voltage
Highly Efficient Operation
Precision Reference
Low Bias Current
Intelligent Current Limit Protection
Thermal Shutdown
External Shutdown Control
Non-Isolated Buck Regulator
Secondary High Voltage Post Regulator
+42V Automotive Systems
MSOP - 8
LLP - 8 (4mm x 4mm)
MUA08A
MUA08A
SDC08A
SDC08A
20078302
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
Supplied As
February 5, 2008
www.national.com

Related parts for LM5007MM

LM5007MM Summary of contents

Page 1

... Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter. Connection Diagram Ordering Information Order Number LM5007MM LM5007MMX LM5007SD LM5007SDX © 2008 National Semiconductor Corporation Features ■ Integrated 80V, 0.7A N-Channel Buck Switch ■ ...

Page 2

Typical Application Circuit and Block Diagram www.national.com 2 20078301 ...

Page 3

Pin Descriptions Pin Name 1 SW Switching Node 2 BST Boost Boot–strap capacitor input 3 R Current Limit OFF time programming pin CL Toff = (0.59 + ( RTN Circuit Ground 5 ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND IN BST to GND SW to GND (Steady State) ESD Rating (Note 5) Human Body Model Machine Model Electrical Characteristics Specifications with standard typeface are for T perature range ...

Page 5

... Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: For detailed information on soldering plastic MSOP and LLP packages, refer to the Packaging Data Book available from National Semiconductor Corporation. ...

Page 6

Detailed Operating Description The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80V, 0.7A N-Channel Buck Switch. The device is easy to apply ...

Page 7

Over-Voltage Comparator The over-voltage comparator is provided to protect the output from overvoltage conditions due to sudden input line voltage changes or output loading changes. The over-voltage com- parator monitors the FB pin versus an internal 2.875V refer- ence (OV_REF). ...

Page 8

Ton = 1. - The R pin of the LM5007 also provides a shutdown function ON which disables the regulator and significantly decreases qui- escent power dissipation. By pulling the R Current Limit The LM5007 contains ...

Page 9

Operational Waveforms LM5007 Operation 10V 20V, I OUT IN CH1: Switch Node, CH2: V (AC), CH4: Inductor Current OUT FIGURE 4. Operational Waveforms LM5007 Operation 10V 75V, I OUT IN CH1: Switch ...

Page 10

Demo Board Bill of Materials ITEM PART NUMBER C1 C4532X7R2A105M C2 C4532X7R1E156M C3 C1206C104K5RAC C4 C1206C103K5RAC C5 C3216X7R2A104KT D1 MURA110T3 L1 SLF7045T-101MR60-1 R1 CRCW12062003F R2 CRCW12061003F R3 CRCW12063011F R4 CRCW12061001F R5 CRCW12061R00F U1 LM5007 www.national.com 20078312 FIGURE 8. ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead MSOP Package NS Package Number MUA08A 8-Lead LLP Package NS Package Number SDC08A 11 www.national.com ...

Page 12

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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