MAX1945R 데이터 시트보기 (PDF) - Maxim Integrated

부품명

상세내역

제조사

MAX1945R

1MHz, 1% Accurate, 6A Internal Switch Step-Down Regulators

Maxim Integrated 

1MHz, 1% Accurate, 6A Internal Switch

Step-Down Regulators

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VCC = VCTL1 = VCTL2 = VDD = 3.3V, SYNC = GND, FBSEL = High-Z, VFB = 0.7V, CREF = 0.22µF, TA = -40°C to +85°C, unless

otherwise noted.) (Note 2)

PARAMETER

FB

FB Regulation Voltage

(Error Amp Only)

Maximum Output Current

FB Voltage Margining Output

(Error Amp Only)

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

VFB

IFB_OUT

VMARGIN_

VCOMP = 1V to 2V,

VIN = 2.6V to 5.5V

FBSEL = GND

FBSEL = VCC

FBSEL = High-Z

VIN = 3.3V, VOUT = 1.8V, L = 1µH

MAX1945R,

VCOMP = 1V to 2V,

VIN = 2.6V to 5.5V

CTL1 = VCC,

CTL2 = VCC

CTL1 = GND,

CTL2 = VCC

CTL1 = VCC,

CTL2 = GND

MAX1945S,

VCOMP = 1V to 2V,

VIN = 2.6V to 5.5V

CTL1 = VCC,

CTL2 = VCC

CTL1 = GND,

CTL2 = VCC

CTL1 = VCC,

CTL2 = GND

1.773

2.462

0.788

6

-1.5

2.5

-5.5

-1.5

7.5

-10.5

1.827

2.538

V

0.812

A

+1.5

5.5

-2.5

%

+1.5

10.5

-7.5

FB Input Resistance

FB Input Bias Current

LX

LX On-Resistance High

LX On-Resistance Low

LX Current-Sense

Transresistance

LX Current-Limit Threshold

LX Leakage Current

LX Switching Frequency

LX Minimum Off-Time

LX Maximum Duty Cycle

FB to GND, FBSEL = GND, or VFB = 1.8V,

25

or FBSEL = VCC, or VFB = 2.5V

FBSEL = High-Z, VFB = 0.7V

RON_

HIGH_LX

RON_

LOW_LX

VIN = VBST - VLX = 3.3V

VIN = VBST - VLX = 2.6V

VIN = 3.3V

VIN = 2.6V

From LX to COMP

ILEAK_LX

Duty cycle =100%,

VIN = 2.6V/3.3V/5.5V

VIN = 5.5V,

CTL1 = CTL2 = GND

fSW

VIN = 2.6V/3.3V

tOFF VIN = 2.6V/3.3V

VIN = 2.6V/3.3V

High side

Low side

VLX = 5.5V

LX = GND

SYNC = VCC

SYNC = GND

43

8.0

-6

-100

0.8

400

SYNC = GND 90

SYNC = VCC

80

100

kΩ

0.1

µA

43

mΩ

50

43

mΩ

50

65

mΩ

12.8

A

-2

100

µA

1.2

MHz

600

kHz

180

ns

%

6 _______________________________________________________________________________________

Share Link: