Rainbow-electronics MAX1636 Manual do Utilizador descarregar pdf (Página 6)

100

150

125

225

200

175

250

150 250200 300 350 400 450 500

MAX1636 TOC11

OSC

(kHz)

RESET TIME DELAY (ms)

RESET TIME DELAY

vs. OSC FREQUENCY

OUT

50mV/div

LOAD

CURRENT

LOAD-TRANSIENT RESPONSE

(3.3V/3A, PWM MODE)

MAX1636 TOC12

100µs/div)

150

100

250

200

350

300

400

0 1.0 1.50.5 2.0 2.5 3.0 3.5

DROPOUT VOLTAGE

vs. LOAD CURRENT

MAX1636 TOC10

LOAD CURRENT (A)

- V

OUT

(mV)

OUT

FORCED TO 4.95V

MAX1636

Low-Voltage, Precision Step-Down

Controller for Portable CPU Power

6 _______________________________________________________________________________________

-5

1m 100m 110m 10

-3

MAX1636 TOC07

LOAD CURRENT (A)

LOAD REGULATION ∆ V

OUT

(mV)

-1

-4

-2

LOAD REGULATION

vs. LOAD CURRENT

PWM MODE

OUT

= 5V

_____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 1, V

= 7V, T

= +25°C, unless otherwise noted.)

100

1m 100m 110m 10

EFFICIENCY vs. LOAD CURRENT

(1.8V/4A CIRCUIT)

MAX1636 TOC04

LOAD CURRENT (A)

EFFICIENCY (%)

= 7V

= 22V

= 15V

100

1m 100m 110m 10

EFFICIENCY vs. LOAD CURRENT

(1.8V/7A CIRCUIT)

MAX1636 TOC05

LOAD CURRENT (A)

EFFICIENCY (%)

= 15V

= 7V

= 22V

1000

0.01

015202510530

QUIESCENT SUPPLY CURRENT

vs. INPUT VOLTAGE

0.10

MAX1636 TOC06

INPUT VOLTAGE (V)

QUIESCENT SUPPLY CURRENT (mA)

100

OUT

= 3.3V

0 101520255 3035404550

VL LOAD-REGULATION ERROR

vs. VL LOAD CURRENT

MAX1636 TOC08

VL LOAD CURRENT (mA)

LOAD REGULATION ∆V (mV)

0.3

0.2

0.1

0.4

0.5

0.6

0403010 20 50 60 70 80 90 100

REF LOAD-REGULATION ERROR

vs. REF LOAD CURRENT

MAX1636 TOC09

REF LOAD CURRENT (µA)

LOAD REGULATION ∆V (mV)

1 2 3 4 5 6 7 8 9 10 11 ... 22 23

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