LM3538

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SNVS674A – JUNE 2011 – REVISED MAY 2013

Voltage Regulators Electrical Characteristics

(1) (2)

Unless otherwise noted, VIN_A= VIN_B = VIN_C = 3.6V, CIN_A = 1 µF, CIN_B = 100 nF, CIN_C = 2.2 µF, CLDOX= 1 µF, HWEN = high.

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

(-30°C to +85°C).

(3)

Symbol

Parameter

Condition

Min

Typ

Max

Units

LDO1

−2

+2

Output Voltage Accuracy

IOUTLDO = 1mA, VOUTLDO = 2.80V

%

VOUT

−3

+3

Default Output Voltage

2.80

V

Output Current

1.8V

≤ VIN_C ≤ 5.5V

300

mA

IOUT

Output Current Limit (short circuit)

VOUTLDO = 0V

600

mA

VDO

Dropout Voltage

IOUTLDO = 300mA

220

300

mV

VOUTLDO + 0.5V ≤ VIN_C ≤ 4.5V

Line Regulation

2

IOUTLDO = 1mA

ΔVOUT

mV

Load Regulation

1 mA

≤ IOUTLDO ≤ 300mA

20

f = 100Hz,

CLDO1 = 1 µF,

PSRR

Power Supply Ripple Rejection Ratio

65

dB

IOUTLDO = 20 mA

Output Voltage = 1.20V

LDO2, LDO3, LDO4

-2

+2

Output Voltage Accuracy

IOUTLDO = 1 mA, VOUTLDO = 2.80V

%

-3

+3

VOUT

LDO2

1.80

V

Default Output Voltage

LDO3

1.80

V

LDO4

2.80

Output Current

1.8V

≤ VIN_C ≤ 5.5V

150

mA

IOUT

Output Current Limit (short circuit)

VOUTLDO = 0V

400

mA

VDO

Dropout Voltage

IOUTLDO = 150mA

100

200

mV

VOUTLDO + 0.5V ≤ VIN_C ≤ 4.5V

Line Regulation

2

IOUTLDO = 1mA

ΔVOUT

mV

Load Regulation

1 mA

≤ IOUTLDO ≤ 150mA

10

f = 100 Hz,

CLDOX = 1 µF,

PSRR

Power Supply Ripple Rejection Ratio

65

dB

IOUTLDO = 20mA

Output Voltage = 1.20V

LDO Combined Common Electrical Characteristics

All LDOs Disabled

0.2

1

µA

One LDO Enabled

70

130

Ground Pin Current (GND and PGND-

IGND

Note: IOUTLDOX = 0mA Two LDOs Enabled

100

pin)

µA

Three LDOs Enabled

130

Four LDOs Enabled

160

CLDOX = 1µF, IOUTLDO = 150mA

130

VOUT = 2.8V. Enable of First LDO

tSTART-UP Turn-on Time from Shut-down

(4)

µs

CLDOX = 1µF, IOUTLDO = 150mA

VOUT = 2.8V. Enable of Each Subsequent

70

LDO after First Enabled

TTransient

Start-Up Transient Overshoot

CLDOX = 1µF, IOUTLDO = 150mA

30

mV

(1)

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

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most

likely norm.

(3)

CIN_C, CLDOX : Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.

(4)

Time needed for VOUTLDO to reach 95% of final value.

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