MAX1951ESA+ Maxim Integrated Products, MAX1951ESA+ Datasheet - Page 4

• Manufacturer Part Number: MAX1951ESA+
• Description: IC DC-DC PWM SW REG 2A 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1951ESA+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 5.5 V
• Current - Output: 2A
• Frequency - Switching: 1MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 976mW
• Output Voltage: 0.8 V
• Output Current: 2 A
• Input Voltage: 2.6 V to 5.5 V
• Supply Current: 6 mA
• Switching Frequency: 1 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1MHz, All-Ceramic, 2.6V to 5.5V Input,
2A PWM Step-Down DC-to-DC Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V
4
Note 3: Specifications to -40°C are guaranteed by design and not production tested.
Note 4: The LX output is designed to provide 2.4A RMS current.
COMP
COMP Transconductance
COMP Clamp Voltage, Low
COMP Clamp Voltage, High
COMP Shutdown Resistance
COMP Shutdown Threshold
COMP Startup Current
FB
Output Voltage Range
(MAX1951)
FB Regulation Voltage
(Error Amp Only)
FB Input Resistance
FB Input Bias Current
LX (Note 4)
LX On-Resistance, PMOS
LX On-Resistance, NMOS
LX Current Sense
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
LX Maximum Duty Cycle
IN
_______________________________________________________________________________________
= V
CC
PARAMETER
= 3.3V, PGND = GND, FB in regulation, C
From FB to COMP, V
V
V
From COMP to GND, V
When LX starts/stops switching
COMP = GND
When using external feedback resistors to drive FB
V
From FB to GND
From LX to COMP, V
Duty cycle = 100%, V
V
V
V
IN
IN
COMP
IN
IN
COMP
= 2.6V to 5.5V, V
= 2.6V to 5.5V, V
= 5.5V
= 2.6V to 5.5V
= 1V to 2V, V
= 1.5V, LX = Hi-Z, V
REF
FB
FB
IN
COMP
IN
CONDITIONS
IN
IN
= 2.6V to 5.5V
= 2.6V to 5.5V
= 1.3V
= 1.1V
= 2.6V to 5.5V, high side
= 0.1µF, T
= 2V
= 1.25V
IN
= 2.6V to 5.5V
A
= -40°C to +85°C, unless otherwise noted.) (Note 3)
MAX1951
MAX1952
COMP rising
COMP falling
MAX1951
MAX1952
MAX1952
MAX1951
V
LX = GND
LX
= 5.5V
0.783
1.764
MIN
26.7
1.97
0.17
0.16
-0.1
100
-10
0.6
0.8
2.4
0.8
40
14
10
TYP
0.807
1.836
MAX
+0.1
53.3
2.28
0.35
266
206
V
1.2
1.2
4.5
1.1
30
10
80
40
30
IN
UNITS
MHz
mΩ
mΩ
µA
kΩ
µS
µA
µA
%
Ω
Ω
V
V
V
V
V
A