MAX1952ESA View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1952ESA
Maxim Integrated
MAX1952ESA Datasheet PDF : 15 Pages
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1MHz, All-Ceramic, 2.6V to 5.5V Input,
2A PWM Step-Down DC-to-DC Regulators
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VCC = 3.3V, PGND = GND, FB in regulation, CREF = 0.1µF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
LX
LX On-Resistance, PMOS
LX On-Resistance, NMOS
VIN = 5V
VIN = 3.3V
VIN = 2.6V
VIN = 5V
VIN = 3.3V
VIN = 2.6V
116
140
266
mΩ
163
93
106
206
mΩ
116
LX Current-Sense
Transimpedance
From LX to COMP, VIN = 2.6V to 5.5V
0.16
0.24
0.35
Ω
LX Current-Limit Threshold
High side
Duty cycle = 100%, VIN = 2.6V to 5.5V Low side
2.4
3.1
4.5
A
-0.6
LX Leakage Current
VIN = 5.5V
VLX = 5.5V
LX = GND
-10
10
µA
LX Switching Frequency
VIN = 2.6V to 5.5V
LX Maximum Duty Cycle
VCOMP = 1.5V, LX = Hi-Z, VIN = 2.6V to 5.5V
LX Minimum Duty Cycle
VCOMP = 1V, VIN = 2.6V to 5.5V
THERMAL CHARACTERISTICS
0.85
1
1.1
MHz
100
%
15
%
Thermal-Shutdown Threshold When LX starts/stops switching
TJ rising
TJ falling
160
°C
145
ELECTRICAL CHARACTERISTICS
(VIN = VCC = 3.3V, PGND = GND, FB in regulation, CREF = 0.1µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
PARAMETER
IN AND VCC
IN Voltage Range
Supply Current
Shutdown Current
VCC Undervoltage Lockout
Threshold
REF
REF Voltage
REF Load Regulation
REF Line Regulation
REF Shutdown Resistance
CONDITIONS
Switching with no load, VIN = 5.5V
COMP = GND
When LX starts/stops switching
IREF = 0µA, VIN = 2.6V to 5.5V
IREF = 0 to 40µA, VIN = 2.6V to 5.5V
IREF = 20µA, VIN = 2.6V to 5.5V
From REF to GND, COMP = GND
VCC rising
VCC falling
MIN
TYP
MAX
2.6
5.5
10
1
2.5
1.95
1.95
2.03
0.2
0.4
22
UNITS
V
mA
mA
V
V
%
%
Ω
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