Rainbow Electronics MAX1672 User Manual
Page 2
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
PS
= 6V, C
REF
= 0.1µF, C
OUT
= 4.7µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
IN, PS, LX, OUT, PGO to GND ......................... -0.3V to +11.5V
ILIM, ONA, ONB, FB, 3/5,
REF, PGI to GND......................................-0.3V to (V
PS
+ 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
OUT Short Circuit to GND ..........................................Continuous
Output Current ..................................................................350mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate above +70°C by 8.3mW/°C).......667mW
Operating Temperature Range ......................... -40°C to +85°C
Junction Temperature .................................................... +150°C
Storage Temperature Range ........................... -65°C to +160°C
Lead Temperature (soldering, 10sec) ............................ +300°C
V
PS
= 5.5V
V
OUT
= 0V, ONA = GND, ONB = PS
V
PS
= 2.7V, I
OUT
= 50mA
V
PS
= 5.5V, I
OUT
= 50mA
ILIM = GND
V
LX
= 11V, ONA = GND, ONB = PS
V
PS
= 2.7V, I
LX
= 50mA
I
REF
= 0mA
V
PS
= 5.5V, I
LX
= 50mA
V
IN
= GND to 11V
ONA = GND, ONB = PS, current measured into PS pin
ONA = PS or ONB = GND, current measured into PS pin,
I
OUT
= 0mA
V
IN
= 2V, 3/5 = GND, FB = GND, I
OUT
= 10mA to 150mA
V
FB
= 1.3V
V
IN
= 3V to 5V, 3/5 = GND, I
OUT
= 100mA
Hysteresis = 15mV typical
CONDITIONS
A
0.35
0.7
1.4
Output PFET Current Limit
µA
0.1
1
Output PFET Leakage Current
Ω
2.3
4.6
1.2
2.4
Output PFET Resistance
0.3
0.5
0.7
0.35
0.5
0.65
µA
0.1
1
LX Leakage Current
Ω
0.9
2.0
LX On-Resistance
0.6
1.3
µA
3
6
IN Input Current
nA
1
50
FB Input Current
mV
70
FB Dual-Mode Trip Threshold
4.8
5.2
V
0.9
V
1.8
11.0
Input Voltage
Startup Voltage
1.21
1.25
1.29
V
1.21
1.25
1.29
Reference Voltage
µA
0.1
1
Shutdown Quiescent Current
µA
85
125
Quiescent Current
4.75
5.00
5.25
V
1.25
5.5
Output Voltage Adjustment
Range
%/mA
0.003
Output Load Regulation
%/V
0.15
Output Line Regulation
UNITS
MIN
TYP
MAX
PARAMETER
V
3.17
3.43
3.13
3.30
3.47
Output Voltage
FB = GND,
I
OUT
= 0mA to
150mA
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
V
1.20
1.30
FB Voltage
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
ILIM = PS
A
0.5
0.8
1.1
LX Current Limit
0.6
0.8
1.0
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
3/5 = PS
OUT = FB
3/5 = GND