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MAX1921 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX1921
Description  Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23
PDF  9 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1921 Datasheet(HTML) 4 Page - Maxim Integrated Products

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



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