MAX1927 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1927 Datasheet PDF : 12 Pages
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Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
Typical Operating Characteristics (continued)
(Circuits of Figure 3 and 4, TA = +25°C, unless otherwise noted.)
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
1.4
VOUT = 1V
1.2
1.0
SHDN
0.8
VOUT = 1.8V
0.6
0.4
VOUT = 2.5V
VOUT
0.2
IIN
0
2.6 3.1 3.6 4.1 4.6 5.1 5.6
INPUT VOLTAGE (V)
STARTUP WAVEFORM
MAX1927 toc11
1ms/div
5V/div SHDN
POK
1V/div
200mA/div VOUT
POK WAVEFORM
MAX1927 toc12
5V/div
20ms/div
2V/div
2V/div
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1927 toc13
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1927 toc14
VOUT
(AC-COUPLED)
10mV/div
VOUT
(AC-COUPLED)
10mV/div
IL
200mA/div
LX
5V/div
400ns/div
LX
5V/div
IL
200mA/div
2ms/div
LOAD TRANSIENT
MAX1927 toc15
LINE TRANSIENT
MAX1927 toc16
VOUT
(AC-COUPLED)
100mV/div
VOUT
(AC-COUPLED)
10mV/div
ILOAD
900mA
VIN
500mA/div
250mA
4.2V
3V
2V/div
100µs/div
1ms/div
6 _______________________________________________________________________________________
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