LM828 datasheet(2/15 Pages) TI1

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LM828

SNOS035D – MARCH 2010 – REVISED MAY 2013

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings

(1) (2)

Supply Voltage (V+ to GND, or GND to OUT)

5.8V

V+ and OUT Continuous Output Current

50 mA

Output Short-Circuit Duration to GND(3)

1 sec.

Continuous Power Dissipation (TA = 25°C)

(4)

240 mW

TJMax

(4)

150°C

θJA

(4)

300°C/W

Operating Junction Temperature Range

−40°C to 85°C

Storage Temperature Range

−65°C to +150°C

Lead Temp. (Soldering, 10 seconds)

300°C

ESD Rating(5)

2kV

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when

operating the device beyond its rated operating conditions.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3)

OUT may be shorted to GND for one second without damage. However, shorting OUT to V+ may damage the device and should be

avoided. Also, for temperatures above 85°C, OUT must not be shorted to GND or V+, or the device may be damaged.

(4)

The maximum allowable power dissipation is calculated by using PDMax = (TJMax − TA)/θJA, where TJMax is the maximum junction

temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance of the package.

(5)

The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

Electrical Characteristics

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: V+ = 5V, C1 = C2 = 10 μF.

(1)

Symbol

Parameter

Condition

Min

Typ

Max

Units

V+

Supply Voltage

RL =10kΩ

1.8

5.5

Supply Current

No Load

µA

115

ROUT

Output Resistance(2)

IL = 5 mA

fOSC

Oscillator Frequency(3)

Internal

kHz

fSW

Switching Frequency(3)

Measured at CAP+

kHz

PEFF

Power Efficiency

IL = 5 mA

VOEFF

Voltage Conversion Efficiency

No Load

99.96

(1)

In the test circuit, capacitors C1 and C2 are 10 µF, 0.3Ω maximum ESR capacitors. Capacitors with higher ESR will increase output

resistance, reduce output voltage and efficiency.

(2)

Specified output resistance includes internal switch resistance and capacitor ESR. See the details in the application information.

(3)

The output switches operate at one half of the oscillator frequency, fOSC = 2fSW.

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