Rainbow-electronics MAX1765 Manual do Utilizador descarregar pdf (Página 4)

MAX1765

800mA, Low-Noise, Step-Up DC-DC Converter

with 500mA Linear Regulator

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

OUT

= V

POUT

= V

INL

= V

ONA

= V

ONL

= 3.6V, CLK/SEL = FBL = ONB = TRACK = PGND = GND, ISET = REF (bypassed with

0.22µF), LX = open, OUTL = open (bypassed with 4.7µF), T

= 0°C to +85°C, unless otherwise noted. Typical values are at

=+25 °C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CONTROL INPUTS

1.1V < V

OUT

< 1.8V 0.2

O N A, O NB, O N L

( N ote 5)

1.8V < V

OUT

< 5.5V 0.4

CLK/SEL 1.2V < V

OUT

< 5.5V

0.2 ×

OUT

Input Low Level

TRACK 1.2V < V

INL

< 5.5V

0.2 ×

INL

1.1V < V

OUT

< 1.8V

OUT

- 0.2

O N A, O NB, O N L

( N ote 5)

1.8V < V

OUT

< 5.5V 1.6

CLK/SEL 1.2V < V

OUT

< 5.5V

0.8 ×

OUT

Input High Level

TRACK 1.2V < V

INL

< 5.5V

0.8 ×

INL

Input Leakage Current

(CLK/SEL, ONA, ONB,

ONL, TRACK)

0.01 1 µA

Internal Oscillator Frequency CLK/SEL = OUT 0.8 1 1.2 MHz

External Oscillator

Synchronization Range

0.5 1.2 MHz

Oscillator Maximum Duty Cycle 80 86 90 %

Minimum CLK/SEL Pulse 200 ns

M axi m um C LK/S E L Ri se/Fal l Ti m e 100 ns

1 2 3 4 5 6 7 8 9 ... 18 19

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