V

DD

= 3.3V

TEMPERATURE (ºC)

-40

-25

-10

5

20

35

50

65

80

1.2365

1.236

1.2355

1.235

1.2345

1.234

1.2335

1.233

1.2325

300mA

600mA

10mA

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

1.8

2.1

2.4 2.7

3.0

3.3

3.6

3.9 4.2

4.5

Vin

5

LM2623

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SNVS188I – MAY 2004 – REVISED OCTOBER 2017

Product Folder Links: LM2623

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(1)

VDD tied to BOOT and EN pins. Frequency pin tied to VDD through 121-KΩ resistor. VDD_ST = VDD when start-up occurs. VIN is VDD + D1

voltage (usually 10 mV to 50 mV at start-up).

(2)

This is the current into the VDD pin.

(3)

This is the total current into pins VDD, BOOT, SW, and FREQ.

(4)

When the EN pin is below VEN_LO, the regulator is shut down; when it is above VEN_HI, the regulator is operating.

6.5 Electrical Characteristics

Limits apply for TJ = 25°C and VDD = VOUT = 3.3 V, unless otherwise specified.

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

VDD_ST

Start-up supply voltage 25°C

ILOAD = 0 mA

(1)

1.1

V

VIN_OP

Minimum operating supply

voltage (once started)

ILOAD = 0 mA

0.65

0.8

V

VFB

FB pin voltage

1.24

V

−40°C to 85°C

1.2028

1.2772

VOUT_MAX

Maximum output voltage

14

V

η

Efficiency

VIN = 3.6 V; VOUT = 5 V;

ILOAD = 500 mA

87%

VIN = 2.5 V; VOUT = 3.3 V;

ILOAD = 200 mA

87%

D

Switch duty cycle

17

IDD

Operating quiescent current(2)

FB Pin > 1.3 V; EN Pin at VDD

80

µA

FB Pin > 1.3 V; EN Pin at VDD, −40°C to

85°C

110

ISD

Shutdown quiescent current(3)

VDD, BOOT and SW Pins at 5 V;

EN Pin < 200 mV

0.01

µA

VDD, BOOT and SW Pins at 5 V;

EN Pin < 200 mV,

−40°C to 85°C

2.5

ICL

Switch peak current limit

LM2623A

2.2

2. 85

A

IC

Switch peak current limit

LM2623

1.2

RDS_ON

MOSFET switch on resistance

0.17

Ω

−40°C to 85°C

0.26

ENABLE SECTION

VEN_LO

EN pin voltage low(4)

−40°C to 85°C

0.15 VDD

V

VEN_HI

EN pin voltage high(4)

−40°C to 85°C

0.7 VDD

6.6 Typical Characteristics

VOUT = 5 V

Figure 1. Efficiency vs Supply Voltage

Figure 2. VFB vs Temperature