MAX8646 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX8646 Datasheet PDF : 16 Pages
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6A, 2MHz Step-Down Regulator
with Integrated Switches
Typical Operating Characteristics
(Typical values are: VIN = VDD = 3.3V; VOUT = 1.8V, RFREQ = 50kΩ, IOUT = 6A, and TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT
100
90
80
VOUT = 2.5V
70
VOUT = 1.8V
60
VOUT = 1.2V
50
VIN = VDD = 3.3V
40
0.1
1
10
OUTPUT CURRENT (A)
FREQUENCY vs. INPUT VOLTAGE
1950
1800
- 40°C + 25°C
+ 85°C
1650
1500
1350
1200
- 40°C + 25°C + 85°C
1050
900
2.2
2.6
3.0
3.4
3.8
INPUT VOLTAGE (V)
EFFICIENCY vs. OUTPUT CURRENT
100
95
90
85
80
VOUT = 1.5V
75
VOUT = 1.8V
70
VOUT = 1.2V
65
VIN = VDD = 2.5V
60
0.1
1
10
OUTPUT CURRENT (A)
LOAD REGULATION
0
VIN = VDD = 3.3V
-0.05
VOUT = 2.5V
-0.10
-0.15 VOUT = 1.8V
-0.20
-0.25
VOUT = 1.2V
-0.30
-0.35
-0.40
0
2
4
6
8
LOAD CURRENT (A)
EFFICIENCY vs. OUTPUT CURRENT
100
95
90
85
80
VOUT = 1.8V
VOUT = 1.5V
75
70
VOUT = 1.2V
65 VIN = 2.5V
VDD = 3.3V
60
0.1
1
10
OUTPUT CURRENT (A)
LOAD TRANSIENT
MAX8646 toc06
VIN = VDD = 3.3V
AC-COUPLED
VOUT
50mV/div
IOUT
1A/div
0A
40µs/div
SWITCHING WAVEFORMS
MAX8646 toc07
SOFT-START WAVEFORM
MAX8646 toc08
SHUTDOWN WAVEFORMS
MAX8646 toc09
VOUT
AC-COUPLED VEN
20mV/div
2V/div
VEN
2V/div
0V
0V
2A/div
ILX
0A
VOUT
1V/div
VLX
2V/div
VOUT
1V/div
0V
0V
0V
RLOAD = 0.5Ω
RLOAD = 0.5Ω
100ns/div
400µs/div
10µs/div
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