4A, Low-Noise, High-Frequency,
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
CLK
= +3.6V, ONA =
ONB
= FB = GND,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Input High Level
Logic Input Current
Internal Oscillator Frequency
Maximum Duty Cycle
External Clock Frequency
Range
CLK Pulse Width
CLK Rise/Fall Time
CONDITIONS
ONA,
ONB,
3.3/5, 1.2V < V
OUT
<5.5
CLK, 2.7 V< V
OUT
< 5.5V
ONA,
ONB,
CLK, 3.3/5
520
82
350
(Note 8)
(Note 8)
100
50
600
90
MIN
0.8
×
V
OUT
0.8
×
V
OUT
1
680
94
1000
TYP
MAX
UNITS
V
µA
kHz
%
kHz
ns
ns
MAX1709
ELECTRICAL CHARACTERISTICS
(V
OUT
= V
CLK
= +3.6V, ONA =
ONB
= FB = GND,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 9)
PARAMETER
Output Voltage
FB Regulation Voltage
FB Input Current
Load Regulation
Soft-Start Pin Current
OUT Leakage Current in
Shutdown
OUT Supply Current
n-Channel Switch
On-Resistance
n-Channel Current Limit
Reference Voltage
SS/LIM = unconnected
SS/LIM = 150kΩ to GND
I
REF
= 0
7.5
3.5
1.24
(Note 1)
I
SW
= 1A
V
FB
= +1.5V
Measured between 1A < I
SW
< 5A (Note 2)
SS/LIM = 1V
V
ONB
= 3.6V
V
FB
= 1.5V (Note 6)
3.2
CONDITIONS
V
FB
< 0.1V, V
IN
= +2.4V
3.3/5 = GND, I
SW
= 1A
3.3/5 = OUT, I
SW
= 1A
MIN
3.24
4.9
1.21
TYP
MAX
3.45
5.2
1.27
200
-0.45
5.2
5
400
40
15
7
1.28
UNITS
V
V
nA
%/A
µA
µA
µA
mΩ
V
V
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
