LM20333MH National Semiconductor, LM20333MH Datasheet - Page 4

• Manufacturer Part Number: LM20333MH
• Description: BUCK REG, 3A, ADJ, POWERWISE, 20TSSOP
• Manufacturer: National Semiconductor

Specifications of LM20333MH

• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Output Voltage: 32V
• Output Current: 3A
• Voltage Regulator Case Style: TSSOP
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

www.national.com
Current Limit
Enable
Thermal Shutdown
Thermal Resistance
Note 1: Absolute Maximum Ratings indicate limits beyond witch damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor to each pin.
Note 3: Measured on a 4 layer 2" x 2" PCB with 1 oz. copper weight inner layers and 2 oz. outer layers.
Typical Performance Characteristics
f
V
SW
V
Symbol
T
EN(RISING)
I
GBW
LIMNEG
EN(HYS)
SD(HYS)
A
T
=750kHz, C
T
I
θ
I
θ
g
LIM
VOL
ILIM
EN
SD
JC
JA
m
Parameter
Error Amplifier DC Transconductance
Error Amplifier Voltage Gain
Error Amplifier Gain-Bandwidth Product
Cycle By Cycle Positive Current Limit
Cycle By Cycle Negative Current Limit
Cycle By Cycle Current Limit Delay
EN Pin Rising Threshold
EN Pin Hysteresis
EN Source Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Junction to Case
Junction to Ambient (Note 3)
SS
Efficiency vs. Load Current
= 100nF, T
f
SW
A
= 350 kHz
= 25°C for efficiency curves, loop gain plots and waveforms, and T
30051603
4
Unless otherwise specified: V
Conditions
I
COMP pin open
COMP pin open
V
0 LFM airflow
COMP
EN
= 0V, V
= -50 µA to +50 µA
VIN
= 12V
Efficiency vs. Load Current
f
SW
= 500 kHz
VIN
= 12V, V
J
= 25°C for all others.
Min
450
4.3
1.2
OUT
2000
1.25
Typ
515
150
170
5.2
2.8
5.6
= 3.3V, L= 4.7µH,
50
20
27
7
2
30051604
Max
600
6.0
1.3
Units
µmho
°C/W
°C/W
MHz
V/V
mV
µA
°C
°C
ns
A
A
V