Manualshelf

Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - DC/DC voltage regulator Holder SSOP 20
12345678910
MAX1623
3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
4 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(Circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)
100
0
0.001 0.1 10.01 10
EFFICIENCY
vs. OUTPUT CURRENT
20
MAX1623 TOC01
OUTPUT CURRENT (A)
EFFICIENCY (%)
40
60
80
90
10
30
50
70
V
OUT
= 3.3V, R
TOFF
= 110kΩ
V
OUT
= 1.1V, R
TOFF
= 280kΩ
V
OUT
= 2.5V, R
TOFF
= 180kΩ
0
1
3
2
4
5
0 200100 300 400 500 600
SWITCH OFF-TIME
vs. OFF-TIME RESISTANCE
MAX1623 TOC02
R
TOFF
(kΩ)
t
OFF
(µs)
1000
100
10
1
0.1
0.01
0123
4
56
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1623 TOC03
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
SHDN = IN
SHDN = GND
0
150
50
100
250
200
350
300
0 1000 1500500 2000 2500 3000
SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX1623 TOC04
LOAD CURRENT (mA)
SWITCHING FREQUENCY (kHz)
V
OUT
= 2.5V, R
TOFF
= 180kΩ
V
OUT
= 3.3V, R
TOFF
= 110kΩ
V
OUT
= 1.1V, R
TOFF
= 280kΩ
0
200
150
100
50
300
250
350
400
4.5 4.94.7 5.1 5.3 5.5
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX1623 TOC05
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
V
IN
= 5V, V
OUT
= 3.3V,
R
TOFF
= 110kΩ
V
IN
= 5V, V
OUT
= 2.5V,
R
TOFF
= 180kΩ
0
-0.50
0.10.01 10.001 10
LOAD REGULATION ERROR
vs. LOAD CURRENT
-0.40
MAX1623 TOC07
LOAD CURRENT (A)
LOAD REGULATION ERROR (%)
-0.30
-0.20
-0.10
-0.35
-0.45
-0.25
-0.15
-0.05
V
OUT
= 2.5V, R
TOFF
= 180kΩ
V
OUT
= 3.3V, R
TOFF
= 110kΩ