ADP1621 データシートの表示（PDF） - Analog Devices

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ADP1621

Constant-Frequency, Current-Mode Step-Up DC/DC Controller

Analog Devices 

ADP1621

SPECIFICATIONS

VIN = 5 V, RFREQ = 100 kΩ, fOSC = 200 kHz, TJ = −40°C to 125°C, unless otherwise noted.

Table 1.

Parameter

MAIN CONTROL LOOP

Internal Soft Start Time

PIN Supply Voltage1

IN Supply Voltage1

Shunt Regulation Voltage

Shunt Resistance

IN Quiescent Current

IN Shutdown Current

PIN Supply Current

Static Mode, No Switching

Shutdown Mode

Undervoltage Lockout Threshold at

IN Pin

FB Regulation Voltage

Symbol

tSS

VPIN

VIN

VSHUNT

RSHUNT

IIN

IPIN

VUVLO

VFB

Conditions

IIN = 3 mA, IPIN = 3 mA, TA = 25°C

IIN = 3 mA, IPIN = 3 mA

Current into IN = 8 mA to 12 mA

Current into PIN = 8 mA to 12 mA

VIN = 2.9 V to 5.5 V, VFB = 1.215 V

VIN = 2.9 V to 5.5 V, SDSN = GND

VFB = 1.3 V, VCOMP < VCOMP,ZCT, GATE = 0 V

SDSN = GND

VUVLO rising

VUVLO hysteresis

TA = 25°C

FB Input Current

Line Regulation2

Load Regulation3

Error Amplifier Transconductance

COMP Zero-Current Threshold

COMP Clamp High Voltage

Current-Sense Amplifier Gain

Peak Slope-Compensation Current at

CS Pin4

CS Pin Leakage Current

Shutdown Time

Thermal Shutdown Threshold5

Thermal Shutdown Hysteresis5

OSCILLATOR

Oscillator Frequency Range6

Oscillator Frequency

Oscillator Frequency Tempco

SDSN Input Level Threshold

SDSN Threshold Hysteresis

SDSN Internal Pull-Down Resistor

Synchronization Minimum Pulse Width

Synchronization Maximum Pulse Width

Synchronization Frequency

GATE Minimum On Time

GATE Minimum Off Time

Maximum Duty Cycle6, 7

Recommended Maximum

Synchronized Frequency Ratio6, 8

IFB

∆VFB/∆VIN

∆VFB/∆VCOMP

gm

VCOMP,ZCT

VCOMP,CLAMP

n

ISC,PK

ICS,LEAK

tSD

TTMSD

VFB = 1.215 V, TA = 25°C

2.9 V ≤ VIN ≤ 5 V, TJ = −40°C to +85°C

2.9 V ≤ VIN ≤ 5 V, TJ = −40°C to +125°C

VCOMP = 1.4 V to 1.5 V

TJ = −40°C to +85°C

TJ = −40°C to +125°C

VCS = 0 V to 100 mV maximum

across RS (GATE high)

VCS = 30 V (GATE low)

SDSN pin from high to low or left floating

fOSC

fOSC

fOSC,TC

VSDSN,THRESH

RSDSN

tSYNC,MIN

tSYNC,MAX

fSYNC

tON,MIN

tOFF,MIN

DMAX

fSYNC/fOSC

RFREQ = 65 kΩ, TA = 25°C

VIN = VPIN = 5 V

VSDSN = 0 V to VIN

VSDSN = 0 V to VIN

VFB = 1.215 V, VCOMP = 1.0 V

VFB = 1.215 V, VCOMP = 2.0 V

fSW = 200 kHz, RFREQ = 100 kΩ

fOSC = 200 kHz, RFREQ = 100 kΩ, fSYNC = fSW

Min Typ

Max Unit

2048

Cycles

2.9

VSHUNT V

2.9

VSHUNT V

5.4 5.6

5.7 V

5.2 5.6

6.0 V

13

Ω

7

Ω

1.8

3

mA

1

10

μA

2.2

1.203

1.197

−75

−1

0.85

1.9

1.9

7.5

55

1

1

2.5

−80

1.215

1.215

+25

0.02

0.02

−0.1

300

1.0

2.0

2.0

9.5

70

50

150

−10

10

μA

10

μA

2.8 V

mV

1.227 V

1.233 V

+75 nA

0.06 %/V

0.072 %/V

%

μS

1.15 V

2.1 V

2.2 V

11.5 V/V

85

μA

5

μA

μs

°C

°C

100

1500 kHz

255 325

395 kHz

±0.06

%/°C

1.5 1.7

1.9 V

−0.19

V

100

kΩ

45

100 ns

0.8/fSYNC

ns

110

1800 kHz

180

215 ns

190

230 ns

93

97

%

1.1 1.2

1.4

Rev. A | Page 3 of 32

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