LM2695_15 Datasheet, PDF (1/21 Pages) Texas Instruments – LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator

LM2695
www.ti.com
SNVS413A – JANUARY 2006 – REVISED APRIL 2013
LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator
Check for Samples: LM2695
FEATURES
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•2 Integrated 33V, N-Channel Buck Switch
• Integrated Start-Up Regulator
• Input Voltage Range: 8V to 30V
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Operating Frequency Remains Constant with
Load Current and Input Voltage
• Maximum Duty Cycle Limited During Start-Up
• Adjustable Output Voltage
• Valley Current Limit At 1.25A
• Precision Internal Reference
• Low Bias Current
• Highly Efficient Operation
• Thermal Shutdown
TYPICAL APPLICATIONS
• High Efficiency Point-Of-Load (POL) Regulator
• Non-Isolated Telecommunication Buck
Regulator
• Secondary High Voltage Post Regulator
DESCRIPTION
The LM2695 Step Down Switching Regulator features
all of the functions needed to implement a low cost,
efficient, buck bias regulator capable of supplying
1.25A to the load. This buck regulator contains a 33V
N-Channel Buck Switch, and is available in the
thermally enhanced WSON-10 and HTSSOP-14
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
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.
PACKAGE
• 10-Pin WSON (4 mm x 4 mm)
• 14-Pin HTSSOP
• Exposed Thermal Pad For Improved Heat
Dissipation
Basic Step Down Regulator
8V - 30V
Input
C1
SHUTDOWN
VIN
VCC
R_ON
LM2695
BST
RON/SD
SW
SS
ISEN
C6
FB
RTN
SGND
C3
C4
L1
D1
R1
R2
V_OUT
R3
C2
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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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