Electrical characteristics – Rainbow Electronics MAX1678 User Manual
Page 3
MAX1678
1-Cell to 2-Cell, Low-Noise,
High-Efficiency, Step-Up DC-DC Converter
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(V
BATT
= V
SHDN
= 1.3V, I
LOAD
= 0, FB = GND,
T
A
= -40°C to +85°C
, unless otherwise noted.) (Note 3)
V
PFI
= 650mV, V
PFO
= 6V
V
PFI
= 0, V
OUT
= 3.3V, I
SINK
= 1mA
V
PFI
= 650mV
Falling PFI hysteresis 2%
V
FB
= 1.3V
V
BATT
= 1V
V
OUT
= 3.5V
V
OUT
= 3.3V
V
OUT
= 3.3V
V
FB
< 0.1V
External feedback
V
OUT
= 3.5V
External feedback
0.9V < V
BATT
< 3.3V (t
ON
= K / V
BATT
)
CONDITIONS
V
0.8 x V
BATT
V
IH
SHDN Input High Voltage
V
0.2 x V
BATT
V
IL
SHDN Input Low Voltage
µA
1
PFO Leakage Current
V
0.4
V
OL
PFO Low Output Voltage
nA
10
PFI Input Current
mV
580
642
V
IL,PFI
PFI Trip Voltage
nA
10
FB Input Current
µA
3.5
I
SHDN,BATT
Shutdown Current into BATT
µA
1
I
SHDN,OUT
Shutdown Current into OUT
µA
8
I
Q,BATT
Quiescent Current into BATT
µA
65
I
Q,OUT
Quiescent Current into OUT
V-µs
5.60
11.2
K
On-Time Constant
V
5.5
V
BATT(MAX)
Maximum Operating Input
Voltage
Ω
2.2
P-Channel On-Resistance
Ω
1.5
N-Channel On-Resistance
V
3.12
3.48
V
OUT
Output Voltage (Fixed Mode)
V
2.0
5.5
Output Voltage Range
(Adjustable Mode)
V
1.17
1.28
V
FB
FB Set Voltage
UNITS
MIN
MAX
SYMBOL
PARAMETER
SHDN = GND or BATT
nA
10
SHDN Input Current
Note 2:
Start-up is guaranteed by correlation to measurements of device parameters (i.e., switch on-resistance, on-time, off-time,
and output voltage trip point).
Note 3:
Specifications to -40°C are guaranteed by design and not production tested.