ADP2370(RevA) Просмотр технического описания (PDF) - Analog Devices

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производитель

ADP2370
(Rev.:RevA)

High Voltage, 1.2 MHz/600 kHz, 800 mA, Low Quiescent Current Buck Regulator

Analog Devices 

Data Sheet

ADP2370/ADP2371

SPECIFICATIONS

VIN = VOUT + 1 V or 3.2 V, whichever is greater, EN = VIN, IOUT = 100 mA, CIN = 10 μF, COUT = 10 µF, TA = 25°C for typical specifications,

TJ = −40°C to +125°C for minimum/maximum specifications, unless otherwise noted.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

SUPPLY

Input Voltage Range

VIN

3.2

Quiescent Current

IQ-PSM

FSEL = VIN, SYNC = 0 V, no load, device not

switching

IQ-PWM

FSEL = VIN, SYNC = VIN, no load, device not

switching

ISW-PWM

FSEL = VIN, SYNC = VIN, no load, device switching

Shutdown Current

ISHUT

EN = GND, TJ = −40°C to +85°C

FIXED OUTPUT

Output Current

IOUT

800

Fixed Output Accuracy

VOUT

Initial set point, IOUT = 250 mA, TJ = 25°C

−1

IOUT = 250 mA

−1.5

No load to full load, PWM mode

−3

ADJUSTABLE OUTPUT

Feedback Voltage

VFB

Feedback Voltage Accuracy

VFB-TOL

Initial set point, IOUT = 250 mA, TJ = 25°C

−1

Output Voltage Range

VOUT-ADJ

No load to full load

0.8

FIXED AND ADJUSTABLE OUTPUT

Load Regulation

∆VOUT/∆IOUT No load to full load

Line Regulation

∆VOUT/∆VIN IOUT = 250 mA

Efficiency

EFF

IOUT = 250 mA, VIN = 7.2 V, VOUT = 3.3 V

Overcurrent Frequency Foldback Threshold

Rising

OCFOLDBACK-RISE % of VOUT, VOUT rising

Falling

OCFOLDBACK-FALL % of VOUT, VOUT falling

PSM Threshold

PSMTHRESHOLD VIN = 7.2 V, VOUT = 3.3 V

Feedback Pin Input Current

Fixed

IFB-FIXED

Fixed output voltage model

Adjustable

IFB-ADJUST

Adjustable output voltage model

Minimum On Time

ON-TIMEMIN VIN < 5.5 V

VIN > 5.5 V

Soft Start Time

SSTIME

When EN rises from 0 V to VIN, and VOUT = 0.9 × VOUT

Active Pull-Down Resistance

(ADP2371)

RPULL-DOWN

POWER SWITCH

P-Channel On Resistance

RDSON-P

VIN > 5.5 V, IOUT = 400 mA

VIN < 5.5 V, IOUT = 400 mA

N-Channel On Resistance

RDSON-N

VIN > 5.5 V, IOUT = 400 mA

VIN < 5.5 V, IOUT = 400 mA

Current Limit

P-Channel

ILIM-P

Peak inductor current

N-Channel

ILIM-N

Peak inductor current

Leakage Current

ILEAK-SW

P-Channel

N-Channel

OSCILLATOR

Oscillator Frequency

fOSC

FSEL = VIN, 3.2 V ≤ VIN ≤ 15 V

1.0

FSEL = 0 V, 3.2 V ≤ VIN ≤ 15 V

500

Typ Max Unit

15 V

13.5

μA

725

μA

5.7

mA

1.2 3.5 μA

mA

+1 %

+1.5 %

+3 %

0.8

V

+1 %

14 V

0.125

%/A

0.01

%/V

92

%

50

%

37.5

%

170

mA

2.5

μA

10

nA

65 100 ns

40 60 ns

350

μs

260 400 Ω

400

mΩ

500

mΩ

280

mΩ

400

mΩ

1200 1300 mA

500 550 mA

0.01 1

μA

0.01 1

μA

1.2 1.4 MHz

600 700 kHz

Rev. A | Page 3 of 32

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