LM2623AMMSLASHNOPB datasheet(5/22 Pages) TI

5 / 22 page

= 3.3V

TEMPERATURE (ºC)

-40

-25

-10

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

LM2623

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SNVS188H – MAY 2004 – REVISED NOVEMBER 2014

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

VIN_OP

Minimum operating supply

ILOAD = 0 mA

0.65

0.8

voltage (once started)

VFB

FB pin voltage

1.24

−40°C to 85°C

1.2028

1.2772

VOUT_MAX

Maximum output voltage

VIN = 3.6 V; VOUT = 5 V;

87%

ILOAD = 500 mA

Efficiency

VIN = 2.5 V; VOUT = 3.3 V;

87%

ILOAD = 200 mA

Switch duty cycle

IDD

Operating quiescent current(2)

FB Pin > 1.3 V; EN Pin at VDD

µA

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

110

85°C

VDD, BOOT and SW Pins at 5 V;

0.01

EN Pin < 200 mV

ISD

Shutdown quiescent current(3)

µA

VDD, BOOT and SW Pins at 5 V;

2.5

EN Pin < 200 mV,

−40°C to 85°C

ICL

Switch peak current limit

LM2623A

2.2

2. 85

Switch peak current limit

LM2623

1.2

RDS_ON

MOSFET switch on resistance

0.17

−40°C to 85°C

0.26

ENABLE SECTION

VEN_LO

EN pin voltage low(4)

−40°C to 85°C

0.15 VDD

VEN_HI

EN pin voltage high(4)

−40°C to 85°C

0.7 VDD

(1)

VDD tied to BOOT and EN pins. Frequency pin tied to VDD through 121K 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.

6.6 Typical Characteristics

VOUT = 5 V

Figure 1. Efficiency vs Supply Voltage

Figure 2. VFB vs Temperature

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