MAX1678EUA Maxim Integrated Products, MAX1678EUA Datasheet - Page 2

• Manufacturer Part Number: MAX1678EUA
• Description: DC/DC Switching Converters
• Manufacturer: Maxim Integrated Products

Specifications of MAX1678EUA

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ABSOLUTE MAXIMUM RATINGS
BATT, OUT,LX, SHDN to GND ..............................-0.3V to +6.0V
OUT, LX Current.......................................................................1A
FB, PFI, PFO to GND ................................-0.3V to (V
Reverse Battery Current (T
Continuous Power Dissipation (T
ELECTRICAL CHARACTERISTICS
(V
1-Cell to 2-Cell, Low-Noise,
High-Efficiency, Step-Up 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.
2
Note 1: The reverse battery current is measured from the Typical Operating Circuit’s input terminal to GND when the battery is con-
Minimum Operating Input
Voltage
Maximum Operating Input
Voltage
Start-Up Voltage (Note 2)
Start-Up Voltage Tempco
Output Voltage (Fixed Mode)
Output Voltage Range
(Adjustable Mode)
FB Set Voltage
N-Channel On-Resistance
P-Channel On-Resistance
P-Channel Catch Diode Voltage
Maximum Peak LX Current
On-Time Constant
Quiescent Current into OUT
Quiescent Current into BATT
Shutdown Current into OUT
Shutdown Current into BATT
Efficiency
FB Input Current
PFI Trip Voltage
PFI Input Current
PFO Low Output Voltage
PFO Leakage Current
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
µMAX (derate 4.1mW/°C above +70°C) .......................330mW
BATT
_______________________________________________________________________________________
= V
nected backward. A reverse current of 220mA will not exceed package dissipation limits but, if left for an extended time
(more than 10 minutes), may degrade performance.
PARAMETER
SHDN
= 1.3V, I
LOAD
A
= +25°C) (Note 1) ...............220mA
= 0, FB = GND, T
A
= +70°C)
V
I
V
SYMBOL
I
SHDN,BATT
SHDN,OUT
BATT(MAX)
I
BATT(MIN)
I
LX(MAX)
I
V
Q,BATT
V
Q,OUT
V
V
IL,PFI
V
V
OUT
K
OL
FB
IH
IL
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
OUT
R
V
External feedback
External feedback
V
V
I
0.9V < V
V
V
V
I
V
Falling PFI hysteresis 2%
V
V
V
SHDN = GND or BATT
DIODE
LOAD
FB
OUT
OUT
OUT
OUT
BATT
FB
PFI
PFI
PFI
L
= 3kΩ, T
+ 0.3V)
< 0.1V
= 1.3V
= 650mV
= 0, V
= 650mV, V
= 3.3V
= 3.3V
= 3.5V
= 3.5V
= 20mA, V
= 1V
= 100mA, P-channel switch off
BATT
OUT
A
CONDITIONS
= +25°C
< 3.3V (t
= 3.3V, I
PFO
BATT
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
= 6V
ON
= 2.5V (Figure 7)
SINK
= K / V
= 1mA
BATT
)
0.8 x V
MIN
0.87
3.16
1.19
5.60
590
2.0
BATT
TYP
1.23
0.04
0.01
550
614
0.7
3.3
1.5
0.8
0.1
0.1
0.1
0.1
37
90
-2
1
8
4
2
0.2 x V
A
= +25°C.)
MAX
3.44
1.26
11.2
632
5.5
5.5
1.5
2.2
3.5
0.4
65
10
10
10
BATT
8
1
1
UNITS
mV/°C
V-µs
mA
mV
µA
µA
µA
µA
nA
nA
µA
nA
Ω
Ω
%
V
V
V
V
V
V
V
V
V
V