MAX8737 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8737 Datasheet PDF : 15 Pages
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Dual, Low-Voltage Linear Regulator Controllers
with External MOSFETs
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V, EN_ = CS_ = VCC, VREFIN = 1.0V, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
REFERENCE INPUT
REFIN_ Voltage Range
FAULT PROTECTION
VREFIN_ VCC = 4.75V to 5.5V
0.5
2.5
V
Current-Limit Threshold
VILIM VCS_ - VOUT_
6.5
13.5
mV
Linear Regulator UVP Threshold
(Slow)
UVP(SLOW) With respect to VREFIN; CS_ = VCC
72
88
%
Linear Regulator UVP Threshold
(Fast)
UVP(FAST) With respect to VREFIN; CS_ = VCC
54
66
%
INPUTS AND OUTPUTS
EN_ Input Low Level
EN_ Input High Level
0.6
V
1.6
V
Power-Good Trip Threshold
(Lower)
With respect to error comparator threshold, -15
hysteresis = 4% (falling edge)
Power-Good Output Low Voltage
ISINK = 4mA
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.
-9
%
0.3
V
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
OUTPUT-VOLTAGE DEVIATION
vs. LOAD CURRENT
5
4
3
2
1
0
-1
-2
-3
-4
VOUT = 1.5V
-5
0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
0
FOLDBACK CURRENT LIMIT
vs. OUTPUT VOLTAGE
0.5
1.0
1.5
OUTPUT VOLTAGE (V)
SOFT-START
(EN RISING EDGE)
MAX8737 toc03
5V
0
3V
0
1.5V
0
5V
0
A. EN1, 5V/div
B. DRV1, 2V/div
NO LOAD
A
B
C
D
1ms/div
C. LDO1 OUTPUT, 1V/div
D. PGOOD1, 5V/div
4 _______________________________________________________________________________________
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