LM20242MHX/NOPB National Semiconductor, LM20242MHX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM20242MHX/NOPB
• Description: IC REG SYNC BUCK 2A 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM20242MHX/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 32 V
• Current - Output: 2A
• Frequency - Switching: 250kHz, 750kHz
• Voltage - Input: 4.5 ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• For Use With: LM20242EVAL - BOARD EVAL 2A POWERWISE LM20242
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LM20242MHX

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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: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Typical Performance Characteristics
V
V
Symbol
T
EN(RISING)
EN(HYS)
SD(HYS)
T
T
I
θ
I
θ
LIM
ILIM
EN
SD
JC
JA
Parameter
Cycle By Cycle 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
Efficiency vs. Load Current
f
SW
= 350 kHz, V
OUT
= 3.3V
30031403
4
Unless otherwise specified: T
Conditions
V
0 LFM airflow
EN
= 0V, V
VIN
= 12V
Efficiency vs. Load Current
f
SW
= 500 kHz, V
J
= 25°C, V
OUT
Min
3.1
1.2
= 3.3V
VIN
= 12V
1.25
Typ
150
170
3.7
5.6
50
20
30
2
30031404
Max
4.65
1.3
Units
°C/W
°C/W
mV
µA
°C
°C
ns
A
V