LM5115

SNVS343E – MARCH 2005 – REVISED MARCH 2013

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Absolute Maximum Ratings

(1) (2)

VBIAS to GND

–0.3V to 32V

VCC to GND

–0.3V to 9V

HS to GND

–1V to 76V

VOUT, CS to GND

– 0.3V to 15V

All other inputs to GND

−0.3V to 7.0V

Storage Temperature Range

–55°C to +150°C

Junction Temperature

+150°C

ESD Rating

2 kV

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under

which operation of the device is ensured. Operating Ratings do not imply ensured performance limits. For ensured performance limits

and associated test conditions, see the Electrical Characteristics tables.

(2)

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

specifications.

(3)

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

Ω resistor into each pin.

Operating Ratings

VBIAS supply voltage

5V to 30V

VCC supply voltage

5V to 7.5V

HS voltage

0V to 75V

HB voltage

VCC + HS

Operating Junction Temperature

–40°C to +125°C

Table 1. Typical Operating Conditions

PARAMETER

MIN

TYP

MAX

UNITS

Supply Voltage, VBIAS

4.5

30

V

Supply Voltage, VCC

4.5

7

V

Supply voltage bypass, CVBIAS

0.1

1

µF

Reference bypass capacitor, CVCC

0.1

1

10

µF

HB-HS bootstrap capacitor

0.047

µF

SYNC Current Range (VCC = 4.5V)

50

150

µA

RAMP Saw Tooth Amplitude

1

1.75

V

VOUT regulation voltage (VBIAS min = 3V + VOUT)

0.75

13.5

V

Electrical Characteristics

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VBIAS SUPPLY

Ibias

VBIAS Supply Current

4

mA

VCC LOW DROPOUT BIAS REGULATOR

VccReg

VCC Regulation

VCC open circuit. Outputs not switching

6.65

7

7.15

V

VCC Current Limit

40

mA

VCC Under-voltage Lockout Voltage

Positive going VCC

4

4.5

V

VCC Under-voltage Hysteresis

0.2

0.25

0.3

V

SOFT-START

SS Source Impedance

43

60

77

k

Ω

SS Discharge Impedance

100

Ω

ERROR AMPLIFIER and FEEDBACK REFERENCE

VREF

FB Reference Voltage

Measured at FB pin

0.737

0.75

0.763

V

(1)

Device thermal limitations may limit usable range.

4

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