LM2750SDX datasheet(4/24 Pages) TI

部品番号	LM2750SDX

部品情報	LM2750 Low Noise Switched Capacitor Boost Regulator

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メーカー	TI [Texas Instruments]

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LM2750

SNVS180L – APRIL 2002 – REVISED MAY 2013

www.ti.com

Thermal Information

Junction-to-Ambient Thermal Resistance, WSON-10

Package (

θJA)

(1)

55°C/W

(1)

Junction-to-ambient thermal resistance (

θJA) is taken from a thermal modeling result, performed under the conditions and guidelines set

forth in the JEDEC standard JESD51-7. The test board is a 4 layer FR-4 board measuring 102mm x 76mm x 1.6mm with a 2 x 1 array

of thermal vias. The ground plane on the board is 50mm x 50mm. Thickness of copper layers are 36µm/18µm

/18µm/36µm(1.5oz/1oz/1oz/1.5oz). Ambient temperature in simulation is 22°C, still air. Power dissipation is 1W. The value of

θJA of the

LM2750 in WSON-10 could fall in a range as wide as 50ºC/W to 150ºC/W (if not wider), depending on PCB material, layout, and

environmental conditions. In applications where high maximum power dissipation exists (high VIN, high IOUT), special care must be paid

to thermal dissipation issues. For more information on these topics, see TI's AN-1187 Application Report (SNOA401) and the LAYOUT

RECOMMENDATIONS section of this datasheet.

Electrical Characteristics

(1) (2)

Typical values and limits in standard typeface apply for TJ = 25ºC. Limits in boldface type apply over the operating junction

temperature range. Unless otherwise specified: 2.9V

≤ VIN ≤ 5.6V, VOUT = 5.0V (LM2750-ADJ), V(SD) = VIN, CFLY = 1µF, CIN =

2 x 1µF, COUT = 2 x 1µF

(3).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

2.9V

≤ VIN ≤ 5.6V,

4.80

5.0

5.20

IOUT ≤ 120mA

(-4%)

(+4%)

Output Voltage

V

VOUT

(LM2750-5.0)

(%)

2.7V

≤ VIN ≤ 2.9V,

4.80

5.0

5.20

IOUT ≤ 40mA

(-4%)

(+4%)

IQ

Operating Supply Current

IOUT = 0mA,

5

10

mA

VIH(MIN) ≤ V(SD) ≤VIN

12

ISD

Shutdown Supply Current

V(SD) = 0V

2

µA

VFB

Feedback Pin Voltage (LM2750-

VIN = 3.1V

1.170

1.232

1.294

V

ADJ)

IFB

Feedback Pin Input Current

VFB = 1.4V

1

nA

(LM2750-ADJ)

VR

Output Ripple

COUT = 10µF, IOUT = 100mA

4

mVp-p

COUT = 2.2µF, IOUT = 100mA

15

EPEAK

Peak Efficiency

VIN = 2.7V, IOUT = 40mA

87

%

(LM2750-5.0)

VIN = 2.9V, IOUT = 120mA

85

EAVG

Average Efficiency over Li-Ion Input VIN Range: 2.9V - 4.2V,

70

%

Range

IOUT = 120mA

(LM2750-5.0) (4)

VIN Range: 2.9V - 4.2V,

67

IOUT = 40mA

fSW

Switching Frequency

1.0

1.7

MHz

tON

VOUT Turn-On Time

VIN= 3.0V, IOUT = 100mA,

0.5

ms

(5)

ILIM

Current Limit

VOUT shorted to GND

300

mA

Shutdown Pin (SD) Characteristics

VIH

Logic-High SD Input

1.3

VIN

V

VIL

Logic-Low SD Input

0

0.4

V

IIH

SD Input Current (6)

1.3V

≤ V(SD) ≤ VIN

15

50

µA

IIL

SD Input Current

V(SD) = 0V

−1

1

µA

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.

(3)

CFLY, CIN, and COUT : Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics

(4)

Efficiency is measured versus VIN, with VIN being swept in small increments from 3.0V to 4.2V. The average is calculated from these

measurements results. Weighting to account for battery voltage discharge characteristics (VBAT vs. Time) is not done in computing the

average.

(5)

Turn-on time is measured from when SD signal is pulled high until the output voltage crosses 90% of its final value.

(6)

SD Input Current (IIH ) is due to a 200kΩ (typ.) pull-down resistor connected internally between the SD pin and GND.

4

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