Rainbow-electronics MAX5097 Manual do Utilizador descarregar pdf (Página 4)

MAX5096/MAX5097

40V, 600mA Buck Converters with Low-

Quiescent-Current Linear Regulator Mode

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +14V, I

OUT

= 1mA, C

= 100µF, C

OUT

= 22µF, L = 22µH, C

= 1µF, V

= +2.4V (Figure 2), SGND = PGND = 0V, T

= T

-40°C to +125°C, unless otherwise noted. Typical values are at T

= T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

5V version, MAX5096B/MAX5097B,

5.5V ≤ V

≤ 40V, I

OUT

= 10mA

4.89

5.09

Output Voltage V

OUT

3.3V version, MAX5096A/MAX5097A,

4V ≤ V

≤ 40V, I

OUT

= 10mA

3.219

3.3

3.378

ADJ Set Point V

ADJ

OUT

= 10mA

1.21 1.2375 1.26

ADJ Input Bias Current I

ADJ

= 4V 0.5

100

Adjustable Output Voltage Range

ADJ

OUT

= 10mA

1.237 11.000

Dropout Voltage ∆V

OUT

= 100mA,

OUT

= 0.98 x V

OUT(NOMINAL)

(5V version

only), MAX5096B/MAX5097B

0.37

Startup Response Time

Rising edge of EN to

OUT

= 10% V

OUT(NOMINAL)

= 500Ω, V

ADJ

= SGND,

LDO/BUCK = 4V, C

= 2nF

300 µs

5V version,

+5.5V ≤ V

≤ +40V, I

OUT

= 100mA

0.125

Line Regulation

∆V

OUT

∆V

3.3V version,

+4V ≤ V

≤ +40V, I

OUT

= 100mA

0.093

mV/V

= +25°C

0.242 0.374

5V version,

OUT

= 100µA to

100mA, V

= +14V

= -40°C to +125°C 0.242

= +25°C

0.164 0.237

Load Regulation

∆V

OUT

∆I

OUT

3.3V version,

OUT

= 100µA to

100mA, V

= +14V

= -40°C to +125°C 0.164

mV/mA

Power-Supply Rejection Ratio PSRR

OUT

= 10mA, f = 100Hz, 500mV

P-P

OUT

= +5V, V

= +14V

60 dB

Short-Circuit Current I

= 6V 150 330

500

BUCK MODE (LDO MODE TRANSITION)

LDO/BUCK High Threshold 2.0 V

LDO/BUCK Low Threshold 0.8 V

LDO/BUCK Input Leakage LDO/BUCK = 11V 1 µA

Transition Timing from LDO Mode

to Buck Mode

Falling edge of LDO/BUCK to buck

converter on

Clock

Periods

Transition Timing from Buck

Mode to LDO Mode

Rising edge of LDO/BUCK to LDO

operation

100 µs

SOFT-START, ENABLE (EN) AND RESET

Soft-Start Charge Current I

= 0.1V 3 5 7 µA

Soft-Start Reference Voltage

SS-REF

OUT

= V

OUT(NOMINAL)

- 20% 0.9

0.99

1.1 V

EN High-Voltage Threshold V

ENH

EN = high, regulator on 1.4 V

1 2 3 4 5 6 7 8 9 ... 19 20

MAX5096/MAX5097 1

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