LQA48B datasheet(7/32 Pages) NSC

Part #	LQA48B

Description	Cellular Phone Power Management Unit

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Manufacturer	NSC [National Semiconductor (TI)]

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V

O2 LDO Electrical Characteristics

Unless otherwise noted, V

IN =VBATT = 3.6V. Typical values and limits appearing in normal type apply for TJ = 25˚C. Limits ap-

pearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9)

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

OUT

Accuracy

Output Voltage

1 mA

≤ I

OUT

≤ 200 mA, V

OUT = 2.2V

3.0V

≤ V

BATT =VIN

≤ 5.5V

−3

±1.0

+3

%

V

OUT

Range

Programmable Output Voltage

Range

0µA

≤ I

OUT

≤ 200 mA

Programming Resolution = 100 mV

1.5

2.8

3.0

V

I

OUT

Output Current

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V

150

mA

Output Current Limit

V

OUT = 0V

540

V

IN–VOUT

Dropout Voltage

I

OUT =75mA

30

174

mV

∆V

OUT

Line Regulation

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V, I

OUT =75mA

3

mV

Load Regulation

V

IN = 3.6V, 1 mA

≤ I

OUT

≤ 150 mA

12

41

e

N

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz,

C

OUT = 2.2 µF

27

µV

RMS

PSRR

Power Supply Ripple

Rejection Ratio

f = 217 Hz, C

OUT = 2.2 µF

57

dB

I

GND

Ground Current

I

OUT = 100 µA

30

µA

C

OUT

Output Capacitance

Output Capacitor ESR

0mA

≤ I

OUT

≤ 150 mA

220

µF

5

500

m

Ω

t

START-UP

Start-Up Time from Shutdown

C

OUT = 2.2 µF, IOUT = 150 mA (Note

10)

60

µs

V

O3 LDO Electrical Characteristics

Unless otherwise noted, V

IN =VBATT = 3.6V. Typical values and limits appearing in normal type apply for TJ = 25˚C. Limits ap-

pearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9)

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

OUT

Accuracy

Output Voltage

1 mA

≤ I

OUT

≤ 150 mA, V

OUT = 2.7V

3.0V

≤ V

BATT =VIN

≤ 5.5V

−3

±1.0

+3

%

V

OUT

Range

Programmable Output Voltage

Range

0µA

≤ I

OUT

≤ 150 mA

Programming Resolution = 100 mV

2.5

3.0

3.2

V

I

OUT

Output Current

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V

150

mA

Output Current Limit

V

OUT = 0V

520

V

IN–VOUT

Dropout Voltage

I

OUT =75mA

30

156

mV

∆V

OUT

Line Regulation

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V, I

OUT =75mA

3

mV

Load Regulation

V

IN = 3.6V, 1 mA

≤ I

OUT

≤ 150 mA

12

41

e

N

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz,

C

OUT = 2.2 µF

27

µV

RMS

PSRR

Power Supply Ripple

Rejection Ratio

f = 217 Hz, C

OUT = 2.2 µF

56

dB

I

GND

Ground Current

I

OUT = 500 µA

30

µA

C

OUT

Output Capacitance

Output Capacitor ESR

0mA

≤ I

OUT

≤ 150 mA

220

µF

5

500

m

Ω

t

START-UP

Start-Up Time from Shutdown

C

OUT = 2.2 µF, IOUT = 150 mA (Note

10)

60

µs

Note: This LDO will be ON after start-up by default. It can be disabled via the register file.

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LQA48B Datasheet(PDF) 7 Page - National Semiconductor (TI)

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