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8405

LOW-DROPOUT REGULATORS — HIGH EFFICIENCY

Allegro MicroSystems 

8405

LOW-DROPOUT

REGULATORS

ELECTRICAL CHARACTERISTICS at TA = +25°C, VE ≥ 2.0 V, CBYPASS = TBD (unless otherwise noted).

Limits

Characteristic

Symbol Test Conditions

Min. Typ. Max. Units

Output Voltage

VO

(reference specified VO(nom))

VI ≥ VO(nom) + 1 V, 1 mA ≤ IO ≤ 150 mA*

VI ≥ VO(nom) + 1 V, 1 mA ≤ IO ≤ 150 mA*,

over operating temperature range

— ±0.5 —

%

—

— ±2.0

%

VI = VO(nom), IO = 50 mA

—

— -0.25

V

Output Volt. Temp. Coeff.

aVO

VI = 6 V, IO = 10 mA, TJ ≤ 125°C

— TBD — mV/°C

Output Short-Circuit Current IOM

200 — —

mA

Line Regulation

∆VO(∆VI)

at VI = VO(nom) + 1 V, IO = 3 mA

and VI = 7 V, IO = 3 mA

— 1.0 2.0

mV

Load Regulation

∆VO(∆IO)

at VI = VO(nom) + 1 V, IO = 1 mA

and VI = VO(nom) + 1 V , IO = 150 mA*

— 2.0 —

mV

at VI = 7 V, IO = 1 mA

and VI = 7 V, IO = 150 mA*

— 2.0 —

mV

Dropout Voltage

VImin - VO IO = 100 mA

— 100 —

mV

Ground Terminal Current

IGND

VI = VO(nom) + 1 V, IO = 1 mA

—

80 100

µA

VI = VO(nom) + 1 V, IO = 150 mA*

—

80 100

µA

VI = 7 V, IO = 1 mA

—

80 100

µA

VI = 7 V, IO = 150 mA*

—

80 100

µA

IQ

VI ≤ 7 V, VE ≤ 0.8 V, IO = 0 mA

—

— 1.0

µA

ENABLE Input Voltage

VEH

VI ≥ VO(nom) + 1 V, Output ON

2.0 — —

V

VEL

VI ≥ VO(nom) + 1 V, Output OFF

—

— 0.4

V

ENABLE Input Current

IE

VE = VI = 7 V

—

— ±1.0

µA

Internal Reference Voltage

VREF

— 1.26 —

V

ADJUST Input Current

IADJ

A8405SLH-ADJ only

— 0.10 —

µA

Rejection Ratio

PSRR

VI = VO(nom) + 1.5 V, Vi = 100 mV,

IO = 30 mA, f = 60 Hz

—

70 —

dB

Output Noise

en

10 Hz ≤ f ≤ 100 kHz, IO = 10 mA, CO = 10 µF —

0.2 — µV/√Hz

Thermal Shutdown

TJ

— 170 —

°C

Typical values are at TA = +25°C and are given for circuit design information only.

* Pulse test (≤20 ms). See previous page for duty cycle limitations.

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