Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX8737 User Manual
Page 4
MAX8737
Dual, Low-Voltage Linear Regulator Controllers
with External MOSFETs
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(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
REFERENCE INPUT
REFIN_ Voltage Range
V
REFIN
_
V
CC
= 4.75V to 5.5V
0.5
2.5
V
FAULT PROTECTION
Current-Limit Threshold
V
ILIM
V
CS
_ - V
OUT
_
6.5
13.5
mV
Linear Regulator UVP Threshold
(Slow)
UVP
(SLOW)
With respect to V
REFIN
; CS_ = V
CC
72
88
%
Linear Regulator UVP Threshold
(Fast)
UVP
(FAST)
With respect to V
REFIN
; CS_ = V
CC
54
66
%
INPUTS AND OUTPUTS
EN_ Input Low Level
0.6
V
EN_ Input High Level
1.6
V
Power-Good Trip Threshold
(Lower)
With respect to error comparator threshold,
hysteresis = 4% (falling edge)
-15
-9
%
Power-Good Output Low Voltage
I
SINK
= 4mA
0.3
V
Note 1: Low threshold n-channel MOSFET is required for 2.5V (±2%) output.
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
OUTPUT-VOLTAGE DEVIATION
vs. LOAD CURRENT
MAX8737 toc01
LOAD CURRENT (A)
OUTPUT-VOLTAGE DEVIATION (mV)
1.5
1.0
0.5
-4
-3
-2
-1
0
1
2
3
4
5
-5
0
2.0
V
OUT
= 1.5V
FOLDBACK CURRENT LIMIT
vs. OUTPUT VOLTAGE
MAX8737 toc02
OUTPUT VOLTAGE (V)
CURRENT LIMIT (A)
1.0
0.5
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
0
0
1.5
1ms/div
SOFT-START
(EN RISING EDGE)
5V
3V
C
A
D
MAX8737 toc03
0
0
0
0
1.5V
5V
A. EN1, 5V/div
B. DRV1, 2V/div
NO LOAD
C. LDO1 OUTPUT, 1V/div
D. PGOOD1, 5V/div
B