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LM25115 数据表(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM25115
功能描述  Secondary Side Post Regulator Controller
Download  17 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM25115 数据表(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
20172602
16-Lead TSSOP, LLP
See NS Package Numbers MTC16 and SDA16A
Ordering Information
Ordering Number
Package Type
NSC Package Drawing
Supplied As
LM25115MT
TSSOP-16
MTC16
92 Units Per Anti-Static Tube
LM25115MTX
TSSOP-16
MTC16
2500 shipped as Tape & Reel
LM25115SD
LLP-16
SDA16A
Available Soon
LM25115SDX
LLP-16
SDA16A
Available Soon
Pin Descriptions
Pin
Name
Description
Application Information
1
CS
Current Sense amplifier positive input
A low inductance current sense resistor is connected between
CS and VOUT. Current limiting occurs when the differential
voltage between CS and VOUT exceeds 45mV (typical).
2
VOUT
Current sense amplifier negative input
Connected directly to the output voltage. The current sense
amplifier operates over a voltage range from 0V to 13.5V at the
VOUT pin.
3
AGND
Analog ground
Connect directly to the power ground pin (PGND).
4
CO
Current limit output
For normal current limit operation, connect the CO pin to the
COMP pin. Leave this pin open to disable the current limit
function.
5
COMP
Compensation. Error amplifier output
COMP pin pull-up is provided by an internal 300uA current
source.
6
FB
Feedback. Error amplifier inverting input
Connected to the regulated output through the feedback resistor
divider and compensation components. The non-inverting input
of the error amplifier is internally connected to the SS pin.
7
SS
Soft-start control
An external capacitor and the equivalent impedance of an
internal resistor divider connected to the bandgap voltage
reference set the soft-start time. The steady state operating
voltage of the SS pin equal to 0.75V (typical).
8
RAMP
PWM Ramp signal
An external capacitor connected to this pin sets the ramp slope
for the voltage mode PWM. The RAMP capacitor is charged
with a current that is proportional to current into the SYNC pin.
The capacitor is discharged at the end of every cycle by an
internal MOSFET.
www.national.com
2


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