MAX1700 Maxim, MAX1700 Datasheet - Page 5

• Manufacturer Part Number: MAX1700
• Description: 1-Cell to 3-Cell / High-Power 1A / Low-Noise / Step-Up DC-DC Converters
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = ONA = ONB = FB = PGND = GND, OUT = POUT, V
T
(T
Note 1: Operating voltage. Since the regulator is bootstrapped to the output, once started it will operate down to 0.7V input.
Note 2: Start-up is tested with the circuit of Figure 2.
Note 3: In low-power mode (CLK/SEL = GND), the output voltage regulates 1% higher than low-noise mode (CLK/SEL = OUT or
Note 4: The regulator is in start-up mode until this voltage is reached. Do not apply full load current.
Note 5: Load regulation is measured from no-load to full load where full load is determined by the N-channel switch current limit.
Note 6: Supply current from the 3.30V output is measured between the 3.30V output and the OUT pin. This current correlates
Note 7: ONA and ONB have hysteresis of approximately 0.15xV
Note 8: Specifications to -40°C are guaranteed by design and not production tested.
LOGIC AND CONTROL INPUTS
Input Low Voltage (Note 7)
Input High Voltage (Note 7)
Input High Voltage (Note 7)
Logic Input Current
Internal Oscillator Frequency
Oscillator Maximum Duty Cycle
External Clock Frequency
Range
A
A
= -40°C to +85°C, unless otherwise noted.) (Note 8)
= +25°C, unless otherwise noted.)
100
90
80
70
60
50
40
0.1
synchronized).
directly to the actual battery supply current, but is reduced in value according to the step-up ratio and efficiency. Set V
= 3.6V to keep the internal switch open when measuring the current into the device.
V
V
PARAMETER
IN
EFFICIENCY vs. LOAD CURRENT
IN
= 0.9V
= 2.4V
1
V
LOAD CURRENT (mA)
IN
(V
= 1.2V
OUT
_______________________________________________________________________________________
10
= 3.3V)
Low-Noise, Step-Up DC-DC Converters
PFM
PWM
100
1.2V < V
2.5V < V
1.2V < V
2.5V < V
ONA, ONB, and CLK/SEL
CLK/SEL = OUT
1000
1-Cell to 3-Cell, High-Power (1A),
OUT
OUT
OUT
OUT
100
< 5.5V, ONA and ONB
< 5.5V, CLK/SEL
< 5.5V, ONA and ONB
< 5.5V, CLK/SEL
90
80
70
60
50
40
30
0.1
EFFICIENCY vs. LOAD CURRENT
V
IN
CONDITIONS
= 3.6V
V
1
IN
LOAD CURRENT (mA)
= 1.2V
V
(V
IN
OUT
OUT
= 2.4V
10
.
= 5V)
Typical Operating Characteristics
OUT
PFM
PWM
100
= 3.6V, MAX1701: AIN = LBN = GND, LBP = REF,
1000
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
0.8V
0.8V
0
MIN
260
200
80
-1
OUT
OUT
1
vs. INPUT VOLTAGE (V)
SHUTDOWN CURRENT
T = 85°C
TYP
INPUT VOLTAGE (V)
2
MAX1701
0.2V
0.2V
3
T = 25°C
MAX
340
400
92
1
OUT
OUT
4
T = -40°C
UNITS
5
kHz
kHz
µA
%
V
V
OUT
6
5