MAX1921EUT15+T Maxim Integrated Products, MAX1921EUT15+T Datasheet - Page 4

• Manufacturer Part Number: MAX1921EUT15+T
• Description: IC DC-DC CONV STEP DWN SOT23-6
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1921EUT15+T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.5V
• Current - Output: 400mA
• Frequency - Switching: 1.2MHz
• Voltage - Input: 2 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Power - Output: 695mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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