MAX8739(2006) Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX8739 Datasheet PDF : 19 Pages
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TFT, LCD, DC-DC Converter with
Operational Amplifiers
Typical Operating Characteristics
(Circuit of Figure 1, VIN = 2.5V, VMAIN = 8V, FREQ = IN, TA = +25°C, unless otherwise noted.)
IN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
50
40
SWITCHING
30
20
NOT SWITCHING
10
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
IN SUPPLY CURRENT
vs. TEMPERATURE
30
VIN = 3.3V
28
SWITCHING
26
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
1400
FREQ = IN
1200
1000
24
NOT SWITCHING
22
800
FREQ = GND
600
20
400
-50 -20
10
40
70
100
1
2
3
4
5
6
TEMPERATURE (°C)
INPUT VOLTAGE (V)
STEP-UP REGULATOR SOFT-START
(HEAVY LOAD)
A
0V
B
0V
C
OA
2ms/div
A: VIN, 2V/div
B: VMAIN, 5V/div
C: INDUCTOR CURRENT, 1A/div
STEP-UP REGULATOR
LOAD-TRANSIENT RESPONSE
0V
A
B
0A
C
OA
20µs/div
A: VMAIN, AC-COUPLED, 200mV/div
B: INDUCTOR CURRENT, 500mA/div
C: LOAD CURRENT, 500mA/div
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
A
0V
B
0A
C
OA
20µs/div
A: VMAIN, AC-COUPLED, 200mV/div
B: INDUCTOR CURRENT, 500mA/div
C: LOAD CURRENT, 500mA/div
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