lm5022mme National Semiconductor Corporation, lm5022mme Datasheet - Page 2

• Manufacturer Part Number: lm5022mme
• Description: 60v Low Side Controller For Boost And Sepic
• Manufacturer: National Semiconductor Corporation

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Pin(s)
Connection Diagram
Ordering Information
Pin Descriptions
Part Number
LM5022MM
LM5022MMX
LM5022MME
10
1
2
3
4
5
6
7
8
9
RT/SYNC
COMP
Name
UVLO
GND
VCC
OUT
VIN
CS
FB
SS
Description
Source input voltage
Feedback pin
Error amplifier output and PWM
comparator input
Output of the internal, high voltage linear
regulator.
Output of MOSFET gate driver
System ground
Input Under-Voltage Lock-out
Current Sense input
Oscillator frequency adjust pin and
synchronization input
Soft-start pin
NS Package Drawing
MUB10A
MUB10A
MUB10A
NS Package Number MUB10A
10-Lead MSOP
2
Application Information
Input to the start-up regulator. Operates from 6V to 60V.
Inverting input to the internal voltage error amplifier. The non-
inverting input of the error amplifier connects to a 1.25V
reference.
The control loop compensation components connect between
this pin and the FB pin.
This pin should be bypassed to the GND pin with a ceramic
capacitor.
Connect this pin to the gate of the external MOSFET. The gate
driver has a 1A peak current capability.
Set the start-up and shutdown levels by connecting this pin to the
input voltage through a resistor divider. A 20 µA current source
provides hysteresis.
Input for the switch current used for current mode control and for
current limiting.
An external resistor connected from this pin to GND sets the
oscillator frequency. This pin can also accept an AC-coupled
input for synchronization from an external clock.
An external capacitor placed from this pin to ground will be
charged by a 10 µA current source, creating a ramp voltage to
control the regulator start-up.
20212253
Supplied As
1000 Units on Tape and Reel
3500 Units on Tape and Reel
250 Units on Tape and Reel