MAX1920 Maxim, MAX1920 Datasheet - Page 2

• Manufacturer Part Number: MAX1920
• Description: PLASTIC ENCAPSULATED DEVICES
• Manufacturer: Maxim

IN, FB,
OUT to AGND, LX to PGND
AGND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +0.3V
OUT Short Circuit to GND . . . . . . . . . . . . . . . . . . . . . . . . . . .10s
Continuous Power Dissipation (TA = +70°C)
Low-Voltage, 400mA Step-Down
DC-DC Converters in SOT23
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
2
Input Voltage Range
Startup Voltage
UVLO Threshold
UVLO Hysteresis
Quiescent Supply Current
Quiescent Supply Current
Dropout
Shutdown Supply Current
Output Voltage Accuracy
(MAX1921)
OUT BIAS Current
Output Voltage Range (MAX1920)
FB Feedback Threshold
(MAX1920)
FB Feedback Hysteresis
(MAX1920)
FB Bias Current (MAX1920)
Load Regulation
Line Regulation
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Leakage Current
High-Side Current Limit
IN
6-Pin SOT23-6 (derate 8.7mW/°C above +70°C) . . . .695mW
_______________________________________________________________________________________
= 3.6V, SHDN = IN, T
SHDN to AGND . . . . . . . . . . . . . . . . . . . . .-0.3V to +6V
PARAMETER
A
= 0°C to +85°C. Typical parameters are at T
. . . . . . . . . . . .-0.3V to (IN + 0.3V)
SYMBOL
I
UVLO
I
V
SHDN
I
I
SHDN
V
LIMP
V
OUT
V
I
V
I
I
HYS
FB
IN
IN
FB
IN
IH
IL
I(LX) < 400mA
I(LX) < 200mA
(MAX1921EUT15, MAX1921EUT18)
V
V
No switching, no load
SHDN = IN, OUT/FB = 0
SHDN = GND
I
I
I
SHDN = 0
OUT at regulation voltage
Figure 4, IN = 4.5V
T
T
FB = 1.5V
I
V
SHDN = GND or IN
OUT
OUT
OUT
OUT
A
A
IN
IN
IN
= 25°C
= -40°C to +85°C
rising
falling
= 2.5V to 5.5V
= 0, T
= 0 to 400mA, T
= 0 to 200mA, T
= 0 to 400mA
A
= +25°C
CONDITIONS
Operating Temperature Range . . . . . . . . . . . . . .-40°C to +85°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Lead Temperature (soldering 10s) . . . . . . . . . . . . . . . . .+300°C
A
A
= -40°C to +85°C
= -40°C to +85°C
A
= +25°C, unless otherwise noted.) (Note 1)
1.220
1.210
1.231
1.50
MIN
1.25
-1.5
525
2.0
2.5
1.6
-3
-3
0.005
0.001
TYP
1.85
1.65
1.25
1.25
0.01
200
220
730
0.1
0.2
50
8
5
1.269
1.280
1.280
1.000
MAX
1.95
+1.5
4.00
0.20
300
950
5.5
2.0
4.0
0.4
2.5
70
+3
+3
16
1
UNITS
%/mA
%/V
mV
mV
mA
µA
µA
µA
µA
µA
µA
%
V
V
V
V
V
V
V