MAX8625A Maxim Integrated Products, MAX8625A Datasheet - Page 2

• Manufacturer Part Number: MAX8625A
• Description: Step-Up/Down DC-DC Converter
• Manufacturer: Maxim Integrated Products

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ABSOLUTE MAXIMUM RATINGS
IN, OUT, SKIP, ON to GND ......................................-0.3V to +6V
REF, FB, to GND...............................................-0.3V, (IN + 0.3V)
LX2, LX1 (Note 1).........................................................±1.5A
Continuous Power Dissipation (T
High-Efficiency, Seamless Transition,
Step-Up/Down DC-DC Converter
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
Typical values are at T
Note 1: LX1 and LX2 have internal clamp diodes to IN, PGND and OUT, PGND, respectively. Applications that forward bias these
2
Supply Range
UVLO Threshold
Quiescent Supply Current, FPWM
Mode, Switching
Quiescent Supply Current, Skip
Mode, Switching
Quiescent Supply Current, No
Switching, Skip Mode
Shutdown Supply Current
Output Voltage Accuracy
(Fixed Output)
Output Voltage Range
(Adjustable Output)
Maximum Output Current
Soft-Start
Load Regulation
Line Regulation
OUT Bias Current
REF Output Voltage
REF Load Regulation
FB Feedback Threshold
Single-Layer Board (derate 18.5mW/°C
IN
above T
_______________________________________________________________________________________
= 3.6V, ON = SKIP = IN, FB = GND, V
diodes should take care not to exceed the device's power-dissipation limits.
PARAMETER
A
= +70°C) ...................................................1482mW
A
= +25°C, unless otherwise noted.) (Note 2)
A
= +70°C)
SYMBOL
UVLO
V
I
V
V
OUT
I
I
I
I
REF
IN
IN
IN
IN
FB
IN
OUT
= 3.3V, LX_ unconnected, C
V
No load, V
SKIP = GND, no load
SKIP = GND, FB = 1.3V
ON = GND, T
T
PWM mode, V
I
T
SKIP mode, valley regulation value
Average skip voltage
Load step +0.5A
V
L = 3.3µH; C
I
V
V
V
I
I
to 5.5V
OUT
OUT
REF
OUT
A
A
IN
IN
IN
OUT
IN
= +85°C
= -40°C to +85°C (Note 3)
rising, 60mV hysteresis
= 3.6V
= 2.5V to 5.5V
= 2.5V to 5.5V
= 10µA
= 0 to 0.5A, V
= 0 to 500mA
= 0 to full load, PWM mode; V
= 3.3V
RMS
OUT
OUT
A
IN
= 3.2V
CONDITIONS
= +25°C
= 2.5V to 5.5V
= C3 + C4 = 44µF
IN
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= 2.5V to 5.5V,
REF
= C5 = 0.1µF to GND, Figure 4. T
IN
= 2.5V
1.244
1.244
2.20
1.25
MIN
2.5
-1
3.285
TYP
3.30
3.28
0.80
0.03
1.25
1.25
250
0.1
0.2
0.1
15
37
35
-3
3
1
A
= -40°C to +85°C.
1.256
1.258
MAX
2.49
4.00
5.5
+1
22
45
1
mA/ms
UNITS
%/mA
%/V
mA
mV
µA
µA
µA
µA
%
%
V
V
V
V
V
A
V
V