LTC3302

4

Rev. 0

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Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3302 is tested under pulsed load conditions such

that TJ ≈ TA. The LTC3302R is guaranteed over the –40°C to 150°C

operating junction temperature range. The LTC3302J is guaranteed

over the –40° C to 150°C operating junction temperature range. High

junction temperatures degrade operating lifetimes; operating lifetime

is derated for junction temperatures above 125°C. Note that the

maximum ambient temperature consistent with these specifications is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal impedance, and other environmental

factors. The junction temperature (TJ in °C) is calculated from ambient

temperature (TA in °C) and power dissipation (PD in Watts) according

to the formula: TJ = TA + (PD • θJA), where θJA (in °C/W) is the package

thermal impedance.

The LTC3302 includes overtemperature protection that protects the device

during momentary overload conditions. Junction temperatures exceed

150°C when overtemperature protection is engaged. Continuous operation

above the specified maximum operating junction temperature may impair

device reliability.

Note 3: Supply current specification does not include switching currents.

Actual supply currents are higher.

ELECTRICAL CHARACTERISTICS

Switch On-Resistance vs VIN

Switch On-Resistance

vs Temperature

Switching Frequency vs VIN

Normalized Regulation Voltage

(to 1.2V) vs Temperature

Minimum On-Time vs VIN

Minimum On-Time vs Temperature

TEMPERATURE (°C)

–50 –25

0

25

50

75 100 125 150

1.190

1.191

1.192

1.193

1.194

1.195

1.196

1.197

1.198

1.199

1.200

1.201

1.202

1.203

1.204

1.205

3302 G01

INPUT VOLTAGE (V)

2

2.5

3

3.5

4

4.5

5

5.5

10

20

30

40

50

60

70

3302 G02

150°C

25°C

–50°C

VIN = 5.5V

VIN = 3.3V

VIN = 2.25V

TEMPERATURE (°C)

–50 –25

0

25

50

75 100 125 150

10

20

30

40

50

60

70

3302 G03

PMOS

NMOS

INPUT VOLTAGE (V)

2

2.5

3

3.5

4

4.5

5

5.5

0

15

30

45

60

75

90

105

120

135

150

3302 G04

VIN = 3.3V

PMOS

NMOS

TEMPERATURE (°C)

–50 –25

0

25

50

75 100 125 150

0

30

60

90

120

150

3302 G05

INPUT VOLTAGE (V)

2

2.5

3

3.5

4

4.5

5

5.5

1.85

1.88

1.91

1.94

1.97

2.00

2.03

2.06

2.09

2.12

2.15

3302 G06

TYPICAL PERFORMANCE CHARACTERISTICS V

IN = 3.3V, TA = 25°C, unless otherwise noted.