LQA48B datasheet(8/32 Pages) NSC

Part #	LQA48B

Description	Cellular Phone Power Management Unit

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Manufacturer	NSC [National Semiconductor (TI)]

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V

O4 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

≤ 50 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

≤ 50 mA

Programming Resolution = 100 mV

1.5

3.0

V

I

OUT

Output Current

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V

50

mA

Output Current Limit

V

OUT = 0V

140

V

IN–VOUT

Dropout Voltage

I

OUT =25mA

7

90

mV

∆V

OUT

Line Regulation

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V, I

OUT =25mA

3

mV

Load Regulation

V

IN = 3.6V, 1 mA

≤ I

OUT

≤ 50 mA

4

31

e

N

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz,

C

OUT = 1.0 µF

27

µV

RMS

PSRR

Power Supply Ripple

Rejection Ratio

f = 217 Hz, C

OUT = 1.0 µF

56

dB

I

GND

Ground Current

I

OUT = 100 µA

30

µA

C

OUT

Output Capacitance

Output Capacitor ESR

0µA

≤ I

OUT

≤ 50 mA

120

µF

5

500

m

Ω

t

START-UP

Start-Up Time from Shutdown

C

OUT = 1.0 µF, IOUT = 50 mA (Note

10)

60

µs

V

O5 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

≤ 50 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

≤ 50 mA

Programming Resolution = 100 mV

2.5

2.8

3.2

V

I

OUT

Output Current

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V

50

mA

Output Current Limit

V

OUT = 0V

160

V

IN–VOUT

Dropout Voltage

I

OUT =25mA

7

90

mV

∆V

OUT

Line Regulation

(V

OUT + 0.25V, 3.0V)MAX

≤ V

BATT

V

BATT =VIN

≤ 5.5V, I

OUT =25mA

3

mV

Load Regulation

V

IN = 3.6V, 1 mA

≤ I

OUT

≤ 50 mA

4

31

e

N

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz,

C

OUT = 1.0 µF

27

µV

RMS

PSRR

Power Supply Ripple

Rejection Ratio

f = 217 Hz, C

OUT = 1.0 µF

56

dB

I

GND

Ground Current

I

OUT = 100 µA

30

µA

C

OUT

Output Capacitance

Output Capacitor ESR

0µA

≤ I

OUT

≤ 50 mA

120

µF

5

500

m

Ω

t

START-UP

Start-Up Time from Shutdown

C

OUT = 1.0 µF, IOUT = 50 mA (Note

10)

60

µs

Note: This LDO will be ON after start-up by default.

Note: This LDO has an external active high enable pin, VO5-EN as well as the internal register enable bit. The LDO is on if either of these is “1” (OR-function). The

enable bit is “1” by default and can be disabled via the register file.

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LQA48B Datasheet(PDF) 8 Page - National Semiconductor (TI)

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