MAX16935RATEB/V 데이터 시트보기 (PDF) - Maxim Integrated

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MAX16935RATEB/V

36V, 3.5A, 2.2MHz Step-Down Converters with 28µA Quiescent Current

Maxim Integrated 

MAX16935/MAX16939

36V, 3.5A, 2.2MHz Step-Down Converters

with 28µA Quiescent Current

Electrical Characteristics (continued)

(VSUP = VSUPSW = 14V, VEN = 14V, L1 = 2.2FH, CIN = 4.7FF, COUT = 22FF, CBIAS = 1FF, CBST = 0.1FF, RFOSC = 12kI,

TA = TJ = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.)

PARAMETER

SYMBOL

CONDITIONS

OUTPUT VOLTAGE (OUT)

FPWM Mode Output Voltage

Skip Mode Output Voltage

Load Regulation

Line Regulation

VOUT_5V

VOUT_3.3V

VOUT_SKIP_5V

VOUT_SKIP_3.3V

VFB = VBIAS, 6V < VSUPSW < 36V,

fixed-frequency mode (Notes 3, 4)

No load, VFB = VBIAS, skip mode (Note

5)

VFB = VBIAS, 300mA < ILOAD < 3.5A

VFB = VBIAS, 6V < VSUPSW < 36V

(Note 4)

BST Input Current

LX Current Limit

LX Rise Time

Skip Mode Current Threshold

IBST_ON

IBST_OFF

ILX

ISKIP_TH

High-side MOSFET on, VBST - VLX = 5V

High-side MOSFET off, VBST - VLX = 5V,

TA = +25°C

Peak inductor current

RFOSC = 12kW

TA = +25°C

MAX16935

MAX16939

Spread Spectrum

Spread spectrum enabled

High-Side-Switch

On-Resistance

RON_H

ILX = 1A, VBIAS = 5V

High-Side-Switch Leakage

Current

Low-Side Switch

On-Resistance

RON_L

High-side MOSFET off, VSUP = 36V,

VLX = 0V, TA = +25NC

ILX = 0.2A, VBIAS = 5V

Low-Side Switch

Leakage Current

VLX = 36V, TA = +25NC

TRANSCONDUCTANCE AMPLIFIER (COMP)

FB Input Current

FB Regulation Voltage

FB Line Regulation

Transconductance

(from FB to COMP)

IFB

VFB

DVLINE

gm

FB connected to an external resistor

divider, 6V < VSUPSW < 36V (Note 6)

6V < VSUPSW < 36V

VFB = 1V, VBIAS = 5V

Minimum On-Time

Maximum Duty Cycle

OSCILLATOR FREQUENCY

tON_MIN

DCMAX

(Note 5)

Oscillator Frequency

RFOSC = 73.2kI

RFOSC = 12kI

MIN TYP MAX

4.9

5

5.1

3.234 3.3 3.366

4.9

5

5.15

3.234 3.3

3.4

0.5

0.02

1

1.5

2

5

4.2

5.2

6.2

4

150 300 400

200 400 500

fOSC Q6%

100 220

1

3

1.5

3

1

20

100

0.99 1.0 1.015

0.02

700

80

98

340 400 460

2.0

2.2

2.4

UNITS

V

V

%

%/V

mA

FA

A

ns

mA

mI

FA

I

FA

nA

V

%/V

FS

ns

%

kHz

MHz

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