Datasheet

MAX1818
500mA Low-Dropout
Linear Regulator in SOT23
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT
+ 500mV or V
IN
= +2.5V, whichever is greater; SHDN = IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 3)
Note 3: All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design.
Note 4: The Dropout Voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
measured for V
IN
= V
OUT(NOM)
+ 500mV. Since the minimum input voltage is 2.5V, this specification is only meaningful when V
OUT(NOM)
> 2.5V. For
V
OUT(NOM)
between 2.5V and 3.5V, use the following equations: Typical Dropout = -93mV/V
✕
V
OUT(NOM)
+ 445mV;
Guaranteed Maximum Dropout = -137mV/V
✕
V
OUT(NOM)
+7004mV. For V
OUT(NOM)
> 3.5V, Typical Dropout = 120mV;
Maximum Dropout = 220mV.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation ΔV
LDR
I
OUT
= 1mA to 500mA 0.4 1.0 %
Output Voltage Noise 10Hz to 1MHz, C
OUT
= 3.3µF (ESR < 0.1Ω) 115 µV
RMS
SHUTDOWN
Shutdown Supply Current I
OFF
SHDN = GND, V
IN
= 5.5V
0.1 15 µA
V
IH
2.5V < V
IN
< 5.5V 1.6
SHDN Input Threshold
V
IL
2.5V < V
IN
< 5.5V 0.6
V
SHDN = IN or GND, T
A
= +25°C 1 25
SHDN Input Bias Current I
SHDN
T
A
= +85°C 5
nA
POK OUTPUT
POK Output Low Voltage V
OL
POK sinking 1mA 0.01 0.1 V
Operating Voltage Range for
Valid POK
POK sinking 100µA 1.0 5.5 V
POK = 5.5V, T
A
= +25°C 1 25
POK Output High Leakage
Current
T
A
= +85°C 5
nA
POK Threshold Rising edge, referred to V
OUT(NOMINAL)
90 93 96 %
THERMAL PROTECTION
Thermal Shutdown Temperature T
SHDN
170 °C
Thermal Shutdown Hysteresis ΔT
SHDN
20 °C
Typical Operating Characteristics
(V
IN
= (V
OUT
+ 500mV) or +2.5V, whichever is greater; SHDN = IN, C
IN
= 1µF, C
OUT
= 3.3µF, T
A
= +25°C, unless otherwise noted.)
0
50
25
125
100
75
150
175
225
200
250
0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
GROUND PIN CURRENT
vs. INPUT VOLTAGE
MAX1818 toc01
INPUT VOLTAGE (V)
GROUND PIN CURRENT (μA)
I
LOAD
= 150mA
3.3V OUTPUT
2.5V OUTPUT
1.8V OUTPUT
40
70
55
85
130
145
115
100
160
0 0.2 0.3 0.4 0.50.1 0.6 0.7 0.8 0.9 1.0
MAX1818 toc02
LOAD CURRENT (A)
GROUND PIN CURRENT (μA)
GROUND PIN CURRENT
vs. LOAD CURRENT
3.3V OUTPUT
2.5V OUTPUT
1.8V OUTPUT
110
130
120
150
140
160
170
-40 10-15 35 60 85
MAX1818 toc03
TEMPERATURE (°C)
GROUND PIN CURRENT (μA)
GROUND PIN CURRENT
vs. TEMPERATURE
1.5V OUTPUT
5.0V OUTPUT
I
LOAD
= 150mA