Buck Controller. LM5116WG Datasheet

LM5116WG Controller. Datasheet pdf. Equivalent

Part LM5116WG
Description Wide Range Synchronous Buck Controller
Feature LM5116WG www.ti.com SNVS599D – OCTOBER 2008 – REVISED FEBRUARY 2013 LM5116WG Wide Range Synchrono.
Manufacture etcTI
Total Page 30 Pages
Datasheet
Download LM5116WG Datasheet



LM5116WG
LM5116WG
www.ti.com
SNVS599D – OCTOBER 2008 – REVISED FEBRUARY 2013
LM5116WG Wide Range Synchronous Buck Controller
Check for Samples: LM5116WG
FEATURES
1
2 Hermetic Package for Harsh Operating
Environments
• Emulated Peak Current Mode
• Wide Operating Range up to 100V
• Low IQ Shutdown (< 10 µA)
• Drives Standard or Logic Level MOSFETs
• Robust 3.5A Peak Gate Drive
• Free-Run or Synchronous Operation to 1 MHz
• Optional Diode Emulation Mode
• Programmable Output from 1.215V to 80V
• Precision 1.5% Voltage Reference
• Programmable Current Limit
• Programmable Soft-Start
• Programmable Line Under-Voltage Lockout
• Automatic Switch to External Bias Supply
• CPGA-20 with No Thermal Shutdown
DESCRIPTION
The LM5116WG is a synchronous buck controller
intended for step-down regulator applications from a
high voltage or widely varying input supply. The
control method is based upon current mode control
utilizing an emulated current ramp. Current mode
control provides inherent line feed-forward, cycle by
cycle current limiting and ease of loop compensation.
The use of an emulated control ramp reduces noise
sensitivity of the pulse-width modulation circuit,
allowing reliable control of very small duty cycles
necessary in high input voltage applications. The
operating frequency is programmable from 50 kHz to
1 MHz. The LM5116WG drives external high-side and
low-side NMOS power switches with adaptive dead-
time control. A user-selectable diode emulation mode
enables discontinuous mode operation for improved
efficiency at light load conditions. A low quiescent
current shutdown disables the controller and
consumes less than 10 µA of total input current.
Additional features include a high voltage bias
regulator, automatic switch-over to external bias for
improved efficiency, frequency synchronization, cycle
by cycle current limit and adjustable line under-
voltage lockout. The device is available in a CPGA-20
high temperature ceramic package with the thermal
shutdown feature disabled.
Typical Application
VIN
VIN
CIN RUV2
UVLO
RUV1
C SYNC
RT
EN
RT/SYNC
LM5116WG
VCC
HB
CHB
HO
SW
LO
CS
CHF
CCOMP
RCOMP
COMP
FB
SS
CSG
DEMB
RAMP
VOUT
VCCX
AGND PGND
CSS
C RAMP
C VCC
VIN
L
RS
R FB2
RFB1
VOUT
C OUT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2008–2013, Texas Instruments Incorporated



LM5116WG
LM5116WG
SNVS599D – OCTOBER 2008 – REVISED FEBRUARY 2013
Connection Diagram
VIN
UVLO
RT/ SYNC
EN
RAMP
AGND
SS
FB
COMP
VOUT
1
2
3
4
5
6
7
8
9
10
20 SW
19 HO
18 HB
17 VCCX
16 VCC
15 LO
14 PGND
13 CSG
12 CS
11 DEMB
Figure 1. Top View
See Package Number NAR0020A
www.ti.com
2 Submit Documentation Feedback
Product Folder Links: LM5116WG
Copyright © 2008–2013, Texas Instruments Incorporated





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)