User guide

MAX8902A/MAX8902B
Low-Noise 500mA LDO Regulators
in a 2mm x 2mm TDFN Package
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= 5V, OUTS = OUT, circuit of Figure 2 (MAX8902A) and Figure 3 (MAX8902B), T
A
= -40°C to +125°C, unless otherwise
noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
GND
T
A
< +85°C 80 120
GND Supply Current I
OUT
= 0mA
T
A
< +125°C 160
µA
T
A
= +25°C 0.001 +1
GND Shutdown Current V
IN
= 5.5V, EN = 0V
T
A
= +85°C 0.01
µA
SELA/SELB (MAX8902A only)
When shorted to GND or V
IN
500 Ω
Select Input Resistance
When open 1 MΩ
Select Input Capacitance When open 10 pF
EN
EN rising 0.8 1.2
EN falling, T
A
< +85°C 0.4 0.7Enable Input Threshold V
IN
= 1.7V to 5.5V
EN falling, T
A
< +125°C 0.38 0.7
V
T
A
= +25°C -1 0.001 +1
Enable Input Bias Current V
EN
= 0V to 5.5V
T
A
= +85°C 0.01
µA
POK (MAX8902B only)
OUT rising 88 91 94 %
POK Threshold
OUT voltage when POK
switches
OUT falling 88 %
POK Voltage, Low I
POK
= 1mA 10 100 mV
T
A
= +25°C -1 0.001 +1
POK Leakage Current POK = 5.5V, V
EN
= 0V
T
A
= +85°C 0.01
µA
THERMAL SHUTDOWN
T
J
rising 165
Thermal Shutdown Threshold
T
J
falling 150
°C
OUTPUT TRANSIENT
Load Transient I
OUT
= 50mA to 500mA to 50mA, t
RISE
= t
FALL
= 1µs 25
mV/
P-P
Line Transient V
IN
= 4V to 5V to 4V, t
RISE
= t
FALL
= 5µs, I
OUT
= 500mA 3
mV/
P-P
IN-to-OUT Reverse Voltage
Turnoff Threshold
IN falling below OUT 10 mV
Note 1: All devices are production tested at T
A
= +25°C. Specifications over the operating temperature range are guaranteed by
design and characterization.
Note 2: The dropout voltage is defined V
IN
- V
OUT
, when V
OUT
is 5% lower than the value of V
OUT
when V
IN
= V
OUT
+ 0.5V.