Owner manual

MAX8718/MAX8719
High-Voltage, Low-Power Linear Regulators for
Notebook Computers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1 V
IN
= 15V, I
OUT
= 5µA, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range V
IN
428V
Supply Current (MAX8718) I
IN
SHDN = IN, V
IN
= 6V to 28V 25 µA
Supply Current (MAX8719) I
IN
SHDN = IN, V
IN
= 6V to 28V 25 µA
OUT Minimum Load Current 5µA
Shutdown Supply Current SHDN = 0V 3 µA
V
IN
= 6V to 28V, I
LOAD
= 5µA to 100mA,
5/3 = GND
3.10 3.48
OUT Output Voltage (MAX8718)
V
IN
= 6V to 28V, I
LOAD
= 5µA to 100mA,
5/3 = OUT
4.72 5.25
V
FB = OUT, V
IN
= 6V to 28V, I
LOAD
= 1mA
1.215 1.265
FB Threshold (MAX8719) V
FB
FB = OUT, V
IN
= 6V to 28V,
I
LOAD
= 5µA to 100mA (Note 2)
1.18 1.28
V
FB Input Current (MAX8719) I
FB
V
FB
= 1.3V -40
+40
nA
5/3 Input Current (MAX8718) I
5/3
V
5/3
= 5V -30
+30
nA
Dropout Voltage
V
DROPOUT
I
LOAD
= 100mA (Note 3) 560 mV
Output Current Limit I
LIM
V
OUT
= 0, V
IN
= 6V
125
375 mA
MAX8718
0.16
Capacitive Load Requirements
MAX8719
0.23
µF/mA
Startup Time Response
Rising edge of IN or SHDN to OUT within
spec limits, C
OUT
= 10µF, R
LOAD
= 500Ω,
V
OUT
= 5V
1ms
V
CC
Threshold (MAX8718) -40°C < T
A
< +85°C, rising edge only
0.85 ×
V
OUT
0.95 ×
V
OUT
V
V
CC
Threshold (MAX8719) -40°C < T
A
< +85°C, rising edge only
0.85 ×
V
FB
0.95 ×
V
FB
V
PGOOD Active-Timeout Period
100
300 ms
PGOOD Output Low Voltage I
SINK
= 1.6mA, V
CC
= GND 0.3 V
SHDN Input Low Voltage
0.25
V
SHDN Input High Voltage 1.4 V
SHDN Input Bias Current V
SHDN
= 0 or 15V, T
A
= -40°C to +85°C-1 +1µA
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using standard quality control (SQC) methods.
Note 2: Pulse test at V
IN
= 28V, I
OUT
= 100mA to avoid exceeding package power-dissipation limits.
Note 3: Dropout voltage is tested by reducing the input voltage until V
OUT
drops to 100mV below its nominal value as measured
with V
IN
starting 2V above V
OUT
.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.