1.0

1.6

2.2

2.8

3.4

4.0

800

600

400

200

0

SHDN PIN VOLTAGE (V)

0

10

20

30

40

50

60

70

80

90

100

0

20

40

60

80

100

120

LOAD CURRENT (mA)

VIN = 12V

VIN = 24V

0.0

0.1

0.2

0.3

LOAD CURRENT (A)

0

20

40

60

80

100

VIN = 36V

VIN = 12V

VIN = 24V

0.0

0.1

0.2

0.3

LOAD CURRENT (A)

0

20

40

60

80

100

VIN = 12V

VIN = 24V

0.4

0.5

0.6

VIN = 36V

7

LM2840-Q1, LM2841-Q1, LM2842-Q1

www.ti.com

SNVSBE5 – APRIL 2019

Product Folder Links: LM2840-Q1 LM2841-Q1 LM2842-Q1

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Copyright © 2019, Texas Instruments Incorporated

6.6 Typical Characteristics

The part numbers in this section represent both the Q1 and non-Q1 versions of the respective parts.

LM2842X

VOUT = 3.3 V

Figure 1. Efficiency vs Load Current

LM2841X

VOUT = 3.3 V

Figure 2. Efficiency vs Load Current

LM2840X

VOUT = 8 V

Figure 3. Efficiency vs Load Current

X option

Figure 4. Switching Frequency vs Temperature

Figure 5. Input UVLO Voltage vs Temperature

Soft-Start Implementation

LM284[0,1]

Figure 6. Switch Current Limit vs SHDN Pin Voltage