Datasheet

MAX1763
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V
ONA
= V
AIN
= V
OUT
= 3.6V, T
A
= -40°C to +85°C, unless other-
wise noted.) (Note 8)
PARAMETER CONDITIONS MIN MAX UNITS
LOGIC INPUTS
Gain-Block Enable Threshold
(V
OUT
- V
AIN
) (Note 6)
1.4 V
Gain-Block Disable Threshold
(V
OUT
- V
AIN
) (Note 6)
0.2 V
CLK/SEL Input Low Level 2.5 V ≤ V
OUT
≤ 5.5V
(0.2)
V
OUT
V
CLK/SEL Input High Level 2.5 V ≤ V
OUT
≤ 5.5V
(0.8)
V
OUT
V
1.1 V ≤ V
OUT
≤ 1.8V 0.2
ONA and ONB Input Low Level
(Note 7)
1.8 V ≤ V
OUT
≤ 5.5V 0.4
V
1.1 V ≤ V
OUT
≤ 1.8V
V
OUT
- 0.2V
ONA and ONB Input High Level
(Note 7)
1.8V ≤ V
OUT
≤ 5.5V 1.6
V
Input Leakage Current CLK/SEL, ONA, ONB 1µA
Note 1: Operating voltage. Because the regulator is bootstrapped to the output, once started, the MAX1763 will operate down to
0.7V input. For conditions where V
IN
might exceed the set V
OUT
, or where V
OUT
is set above 4V, an external Schottky diode
must be connected from LX to POUT.
Note 2: Startup is tested with the circuit of Figure 2.
Note 3: Defines low-noise mode maximum step-up ratio.
Note 4: The regulator is in startup mode until this voltage is reached. Do not apply full load current until the output exceeds 2.3V.
Note 5: Supply current from the 3.3V output is measured between the 3.3V output and the OUT pin. This current correlates directly
to the actual battery-supply current, but is reduced in value according to the step-up ratio and efficiency. The gain block is
disabled.
Note 6: Connect AIN to OUT to disable gain block.
Note 7: ONA and ONB have hysteresis of approximately 0.15
✕
V
OUT
.
Note 8: Specifications to -40°C are guaranteed by design and not production tested.