Rainbow-electronics MAX1644 Manual do Utilizador Página 4

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 11
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 3
MAX1644
2A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
4 _______________________________________________________________________________________
Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
110
0
10
30
20
40
50
70
60
80
90
100
0.001 0.01 0.1
EFFICIENCY vs. OUTPUT CURRENT
MAX1644-01
OUTPUT CURRENT (A)
EFFICIENCY (%)
V
IN
= 5V, V
OUT
= 3.3V,
L = 6.0µH, R
TOFF
= 120k
100
110
0
10
30
20
40
50
70
60
80
90
0.001 0.01 0.1
EFFICIENCY vs. OUTPUT CURRENT
MAX1644-02
OUTPUT CURRENT (A)
EFFICIENCY (%)
V
IN
= 3.3V, V
OUT
= 1.5V,
L = 4.7µH, R
TOFF
= 200k
V
IN
= 5V, V
OUT
= 1.5V,
L = 6.0µH, R
TOFF
= 270k
110
-1.0
-0.9
-0.7
-0.8
-0.6
-0.5
-0.3
-0.4
-0.2
-0.1
0
0.0001 0.001 0.01 0.1
DC LOAD-REGULATION ERROR
vs. OUTPUT CURRENT
MAX1644-03
OUTPUT CURRENT (A)
DC LOAD-REGULATION ERROR (%)
A
B
E
C
D
A: V
IN
= 3.3V, V
OUT
= 1.5V, L = 4.7µH,
R
TOFF
= 200k, FBSEL = GND
B: V
IN
= 3.3V, V
OUT
= 1.5V, L = 4.7µH,
R
TOFF
= 200k, FBSEL = REF
C: V
IN
= 5V, V
OUT
= 3.3V, L = 6.0µH,
R
TOFF
= 120k, FBSEL = OPEN
D: V
IN
= 5V, V
OUT
= 1.5V, L = 6.0µH,
R
TOFF
= 270k, FBSEL = GND
E: V
IN
= 5V, V
OUT
= 1.5V, L = 6.0µH,
R
TOFF
= 270k, FBSEL = REF
0
100
50
250
200
150
300
350
0 1.00.5 1.5 2.0
SWITCHING FREQUENCY
vs. OUTPUT CURRENT
MAX1644-04
OUTPUT CURRENT (A)
SWITCHING FREQUENCY (kHz)
V
IN
= 3.3V,
V
OUT
= 1.5V,
L = 4.7µH,
R
TOFF
= 200k
V
IN
= 5V,
V
OUT
= 1.5V,
L = 6.0µH,
R
TOFF
= 270k
V
IN
= 5V,
V
OUT
= 3.3V,
L = 6.0µH,
R
TOFF
= 120k
0
150
100
50
200
250
300
350
400
450
500
021 3456
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1644-07
SUPPLY VOLTAGE
SUPPLY CURRENT I
CC
(µA)
0
0.03
0.02
0.01
0.04
0.05
0.06
0.07
0.08
0.09
0.10
SHUTDOWN SUPPLY CURRENT I
IN
+ I
CC
(µA)
I
OUT
= 0
UNDERVOLTAGE
LOCKOUT
SHDN = V
IN
= V
CC
SHDN = GND
Vista de página 3
1 2 3 4 5 6 7 8 9 10 11

Comentários a estes Manuais

Sem comentários