User guide

MAX8737
Dual, Low-Voltage Linear Regulator Controllers
with External MOSFETs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V, EN_ = CS_ = V
CC
, V
REFIN
= 1.0V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Linear Regulator UVP Threshold
(Fast)
UVP
(
FAST
)
With respect to V
REFIN
; CS_ = V
CC
54 60 66 %
Slow Short-Circuit Timer Duration
t
UVP
(
SLOW
)
With respect to V
REFIN
; CS_ = V
CC
75 µs
Fast Short-Circuit Timer Duration
t
UVP
(
FAST
)
With respect to V
REFIN
; CS_ = V
CC
5µs
Discharge-Mode On-Resistance
OUT_ Pin
R
OUT
10 Ω
INPUTS AND OUTPUTS
EN_ Input Low Level 0.6 V
EN_ Input High Level Rising edge, 200mV (typ) hysteresis 1.6 V
Enable Leakage Current -1 +1 µA
Power-Good Trip Threshold
(Lower)
With respect to error comparator threshold,
hysteresis = 4% (falling edge)
-15 -12 -9 %
Power-Good Startup Delay 2ms
Power-Good Propagation Delay
t
PGOOD
OUT_ forced 2% beyond PGOOD_ trip
threshold
1µs
Power-Good Output Low Voltage
I
SINK
= 4mA 0.3 V
Power Good Leakage Current
I
GOO
V
OUT
_ = 1.0V (PGOOD_ high impedance),
1µA
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, EN_ = CS_ = V
CC
, V
REFIN
= 1.0V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range V
CC
4.75 5.50
V
V
CC
Undervoltage Lockout
Threshold
Rising edge 200mV hysteresis (typ) 4.1 4.6 V
V
CC
Quiescent Supply Current I
CC
EN1 = EN2 = V
CC
1.5 mA
V
CC
Shutdown Supply Current EN1 = EN2 = GND 5 µA
REFIN to OUT Offset Voltage V
OUT
_-7+7mV
DRIVERS
Output high; V
OUT
_ = V
REFIN
_ - 25mV;
I
LOAD
= 1mA
V
CC
-
0.3
DRV_ Output Voltage Swing
(Note 1)
Output low; V
OUT
_ = V
REFIN
_ + 25mV:
I
LOAD
= 1mA
0.3
V
DRV_ Maximum Sourcing Current
V
OUT
_ = V
REFIN
_ - 25mV; V
DRV
= 3V 3.5 mA
DRV_ Maximum Sinking Current V
OUT
_ = V
REFIN
_ + 25mV; V
DRV
= 3V 3.5 mA
DRV_ Soft-Start Charging Current
I
SOFT
40 400 µA