Typical operating characteristics, Electrical characteristics – Rainbow Electronics MAX863 User Manual
Page 3
MAX863
Dual, High-Efficiency, PFM, Step-Up
DC-DC Controller
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(V
DD
= +5V, I
LOAD
= 0mA, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 6)
Note 1: When bootstrapped, an internal low-voltage oscillator drives the EXT1 pin rail-to-rail for low supply voltages.
Note 2: For non-bootstrapped operation, V
DD
> 2.7V is required to allow valid operation of all internal circuitry.
Note 3: For adjustable output voltages, see the Set the Output Voltage section.
Note 4: Measured with LBI falling. Typical hysteresis is 15mV.
Note 5: EXT1 and EXT2 swing from V
DD
to GND.
Note 6: Specifications to -40°C are guaranteed by design and not production tested.
V
DD
= OUT1 (Note 1)
1.6
11
CONDITIONS
V
DD
Input Voltage
(Note 2)
V
2.8
11
V
DD
V
1.21
1.285
V
FB
FB1, FB2 Threshold Voltage
60
mV
85
115
V
CS
CS1, CS2 Threshold Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
FB1 = V
DD
3.15
3.45
OUT1 Output Voltage
(Note 3)
FB1 = GND
V
4.8
5.2
V
OUT1
SHDN1 = SHDN2 = V
DD
, measured from V
DD
85
Quiescent Current
SHDN1 = V
DD
, SHDN2 = GND,
measured from V
DD
µA
I
DD
SHDN1 = SHDN2 = GND
µA
1
I
DD, SHDN
Shutdown Current
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
0.01
0.1
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(V
OUT1
= 3.3V, BOOTSTRAPPED)
MAX863 toc01
OUTPUT CURRENT (mA)
EFFICIENCY (%)
B
C
A
10
0
30
20
50
40
70
60
90
80
100
V
OUT1
= 3.3V
A: V
IN
= 1.5V
B: V
IN
= 2.4V
C: V
IN
= 2.7V
0.01
0.1
10
0
30
20
50
40
70
60
90
80
100
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(V
OUT1
= 5.0V, BOOTSTRAPPED)
MAX863 toc02
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
OUT1
= 5.0V
A: V
IN
= 1.5V
B: V
IN
= 2.4V
C: V
IN
= 2.7V
D: V
IN
= 3.3V
E: V
IN
= 3.6V
F: V
IN
= 4.0V
B
C
A
D
E
F
0.01
0.1
0
10
20
30
40
50
60
70
80
90
100
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(V
OUT1
= 5.0V, NON-BOOTSTRAPPED)
MAX863 toc03
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
OUT1
= 5.0V
A: V
IN
= 2.7V
B: V
IN
= 3.3V
C: V
IN
= 3.6V
D: V
IN
= 4.0V
A
B
C
D