Datasheet

MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT(SETPOINT)
+ 500mV or V
IN
= +2.25V whichever is greater, SET = GND, SHDN = IN, T
A
= 0°C to +85°C, unless otherwise
noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(SETPOINT)
+ 500mV or V
IN
= +2.25V whichever is greater, SET = GND, SHDN = IN, T
A
= -40°C to +85°C, unless other-
wise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.25 5.5 V
Input Undervoltage Lockout V
UVLO
Rising, 40mV hysteresis 1.85 2.15 V
Output Voltage Accuracy
(Preset Mode)
V
OUT
I
OUT
= 1mA to 500mA -4 +4 %
Adjustable Output Voltage
0.8 4.5 V
SET Voltage Threshold
(Adjustable Mode)
V
SET
I
OUT
= 1mA to 500mA 766 834 mV
Maximum Output Current I
OUT
500 m A
RM S
Short-Circuit Current Limit I
LIM
V
OUT
= 0V 700 2500 mA
SET Dual Mode
™
Threshold 35 125 mV
SET Input Bias Current I
SET
V
SET
= +0.8V -100 +100 nA
Ground-Pin Current I
Q
I
OUT
= 1mA 400 µA
V
OUT
= +2.25V 259 384
V
OUT
= +2.8V 201 315
Dropout Voltage (Note 1) I
OUT
= 500mA
V
OUT
= +4.0V 147 255
mV
Line Regulation ∆V
LNR
V
I N
fr om ( V
OU T
+ 100m V ) to 5.5V , I
L OA D
= 5m A -0.175 +0.175 %/V
Load Regulation ∆V
LDR
I
OUT
= 1mA to 500mA 35 p p m /m A
SHUTDOWN
Shutdown Supply Current I
OFF
SHD N = GND, V
IN
= 5.5V 5 µA
V
IH
2.5V < V
IN
< 5.5V 1.6
SHD N Input Threshold
V
IL
2.5V < V
IN
< 5.5V 0.6
V
SHD N Input Bias Current I
SHDN
SHD N = GND or IN 100 nA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER-OK
POK Output Low Voltage V
OL
Sinking 2mA 5 50 mV
Operating Voltage Range for
Valid POK Output
Sinking 100µA 1.0 5.5 V
Output High-Leakage Current V
POK
= +5.5V 100 nA
Threshold Rising edge, referred to V
OUT(NOMINAL)
90 93 96 %
THERMAL PROTECTION
Ther m al S hutd own Tem p erature T
SHDN
170 °C
Thermal Shutdown Hysteresis ∆T
SHDN
20 °C