LM3150MH/NOPB National Semiconductor, LM3150MH/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3150MH/NOPB
• Description: IC REG SWITCH CTRL 6-42V 14TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®, SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM3150MH/NOPB

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adj to 0.6V
• Current - Output: 12A
• Frequency - Switching: 1MHz
• Voltage - Input: 6 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP Exposed Pad, 14-eTSSOP 14-HTSSOP
• Package: 14TSSOP EP
• Output Voltage: 0.6(Min) V
• Output Current: 12(Max) A
• For Use With: 551600142-002 - WEBENCH BUILD IT BOARD LM3150
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LM3150MH

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Pin
5,9
Connection Diagram
Ordering Information
Pin Descriptions
EP
10
11
12
13
14
1
2
3
4
6
7
8
Order Number
LM3150MHE
LM3150MHX
LM3150MH
SGND
PGND
Name
RON
VCC
ILIM
BST
VIN
SW
HG
EN
SS
LG
EP
FB
Description
Supply Voltage for FET
Drivers
Input Supply Voltage
Enable
Feedback
Signal Ground
Soft-Start
On-time Control
Current Limit
Switch Node
High-Side Gate Drive
Connection for Bootstrap
Capacitor
Low-Side Gate Drive
Power Ground
Exposed Pad
Package Type
eTSSOP-14
Function
Nominally regulated to 5.95V. Connect a 1.0 µF to 4.7 µF decoupling capacitor from
this pin to ground.
Supply pin to the device. Nominal input range is 6V to 42V.
To enable the IC apply a logic high signal to this pin greater than 1.26V typical or
leave floating. To disable the part, ground the EN pin.
Internally connected to the regulation, over-voltage, and short-circuit comparators.
The regulation setting is 0.6V at this pin. Connect to feedback resistor divider between
the output and ground to set the output voltage.
Ground for all internal bias and reference circuitry. Should be connected to PGND at
a single point.
An internal 7.7 µA current source charges an external capacitor to provide the soft-
start function.
An external resistor from VIN to this pin sets the high-side switch on-time.
Monitors current through the low-side switch and triggers current limit operation if the
inductor valley current exceeds a user defined value that is set by R
current, I
Switch pin of controller and high-gate driver lower supply rail. A boost capacitor is
also connected between this pin and BST pin
Gate drive signal to the high-side NMOS switch. The high-side gate driver voltage is
supplied by the differential voltage between the BST pin and SW pin.
High-gate driver upper supply rail. Connect a 0.33 µF-0.47 µF capacitor from SW pin
to this pin. An internal diode charges the capacitor during the high-side switch off-
time. Do not connect to an external supply rail.
Gate drive signal to the low-side NMOS switch. The low-side gate driver voltage is
supplied by VCC.
Synchronous rectifier MOSFET source connection. Tie to power ground plane.
Should be tied to SGND at a single point.
Exposed die attach pad should be connected directly to SGND. Also used to help
dissipate heat out of the IC.
NSC Package Drawing
LIM-TH
eTSSOP-14
MXA14A
, sourced out of this pin during operation.
2
30053102
94 Units per Anti-Static Tube
2500 Units in Tape and Reel
250 Units in Tape and Reel
Supplied As
LIM
and the Sense