MAX1920(2002) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1920 Datasheet PDF : 9 Pages
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Low-Voltage, 400mA Step-Down
DC-DC Converters in SOT23
Typical Operating Characteristics (continued)
(CIN = 2.2µF ceramic, Circuit of Figure 1, components of Table 1, unless otherwise noted.)
10,000
SWITCHING FREQUENCY vs. LOAD
(VOUT = 1.8V)
1000
10,000
SWITCHING FREQUENCY vs. LOAD
(VOUT = 1.5V)
1000
10,000
1000
NO LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
VOUT = 2.5V
VOUT = 3.3V
100
10
1
0.1
100
VIN = 3.3
1
10
100
1000
LOAD (mA)
10
1
0.1
VIN = 3.3
1
10
100
1000
LOAD (mA)
100
VOUT = 1.5V
10
1
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5..0 5.5
SUPPLY VOLTAGE (V)
LIGHT-LOAD SWITCHING WAVEFORM
MAX1920 toc10
MEDIUM-LOAD SWITCHING WAVEFORM
MAX1920 toc11
SOFT-START AND SHUTDOWN RESPONSE
MAX1920 toc12
VOUT
AC-COUPLED
5mV/div
VOUT
AC-COUPLED
5mV/div
VOUT
1V/div
VIN = 3.3V, VOUT = 1.5V,
ILOAD = 40mA
1µs/div
VLX
2V/div
VIN = 3.3V, VOUT = 1.5V,
ILOAD = 250mA
1µs/div
VLX
2V/div
VIN = 3.3V, VOUT = 1.5V,
RLOAD = 6Ω
200µs/div
IIN
100mA/div
VSHDN
5V/div
MEDIUM-LOAD
LINE-TRANSIENT RESPONSE
MAX1920 toc13
VIN
AC-COUPLED
200mV/div
LIGHT-LOAD
LINE-TRANSIENT RESPONSE
MAX1920 toc14
VIN
AC-COUPLED
200mV/div
LOAD-TRANSIENT RESPONSE
MAX1920 toc15
VIN = 3.3V, VOUT = 1.5V,
ILOAD = 20mA TO 320mA
VOUT
AC-COUPLED
100mV/div
IL
200mA/div
VIN = 3.8V to 4.2V,
VOUT = 1.5V, ILOAD = 250mA
4µs/div
VOUT
AC-COUPLED
5mV/div
VIN = 3.8V to 4.2V,
VOUT = 1.5V, ILOAD = 20mA
4µs/div
VOUT
AC-COUPLED
5mV/div
40µs/div
ILOAD
200mA/div
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