User Manual

MAX8840/MAX8841/MAX8842
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT
+ 0.5V, T
A
= -40°C to +85°C, unless otherwise noted. C
IN
= 1µF, C
OUT
= 1µF, C
BP
= 10nF. Typical values are at +25°C;
the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 1)
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.
IN to GND .................................................................-0.3V to +7V
Output Short-Circuit Duration ............................................Infinite
OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V)
FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
6-Pin µDFN (derate 2.1mW/°C above +70°C) .............0.168W
θ
JA
..................................................................................477°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage Range V
IN
26V
I
OUT
= 1mA, T
A
= +25°C -1 +1
I
OUT
= 100µA to 80mA, T
A
= +25°C -2 +2Output Voltage Accuracy
I
OUT
= 100µA to 80mA -3 +3
%
Maximum Output Current I
OUT
150 mA
Current Limit I
LIM
OUT = 90% of nominal value 150 200 300 mA
V
OUT
≥ 3V, I
OUT
= 80mA 80 170
V
OUT
≥ 3V, I
OUT
= 120mA 120
2.5V ≤ V
OUT
< 3V, I
OUT
= 80mA 90 200
2.5V ≤ V
OUT
< 3V, I
OUT
= 120mA 135
2V ≤ V
OUT
< 2.5V, I
OUT
= 80mA 120 250
Dropout Voltage (Note 2)
2V ≤ V
OUT
< 2.5V, I
OUT
= 120mA 180
mV
I
OUT
= 0.05mA 40 90
Ground Current I
Q
V
IN
= V
OUT(nom)
- 0.1V, I
OUT
= 0mA 220 500
µA
Line Regulation V
LNR
V
IN
= (V
OUT
+ 0.5V) to 6V, I
OUT
= 0.1mA 0.001 %/V
Load Regulation V
LDR
I
OUT
= 1mA to 80mA 0.003 %/mA
T
A
= +25°C 0.003 1
Shutdown Supply Current I
SHDN
SHDN = 0V
T
A
= +85°C 0.05
µA
MAX8840 78
f = 1kHz, I
OUT
= 10mA
MAX8841/MAX8842 72
MAX8840 75
f = 10kHz, I
OUT
= 10mA
MAX8841/MAX8842 65
MAX8840 54
Ripple Rejection PSRR
f = 100kHz, I
OUT
= 10mA
MAX8841/ MAX8842 46
dB