Rainbow Electronics MAX1765 - Manual (Page 6)

MAX1765
800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V OUT = V POUT = V INL = V ONA = V ONL = 3.6V, CLK/SEL = FBL = ONB = TRACK = PGND = GND, ISET = REF (bypassed with
0.22µF), LX = open, OUTL = open (bypassed with 4.7µF), T A = -40°C to +85°C, unless otherwise noted.) (Note 6)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CONTROL INPUTS
1.1V < V OUT < 1.8V 0.2 O N A, O NB, O N L
( N ote 5)
1.8V < V OUT < 5.5V 0.4
CLK/SEL 1.2V < V OUT < 5.5V
0.2 ×
V OUT
Input Low Level
TRACK 1.2V < V INL < 5.5V
0.2 ×
V INL
V
1.1V < V OUT < 1.8V
V OUT
- 0.2
O N A, O NB, O N L
( N ote 5)
1.8V < V OUT < 5.5V 1.6
CLK/SEL 1.2V < V OUT < 5.5V
0.8 ×
V OUT
Input High Level
TRACK 1.2V < V INL < 5.5V
0.8 ×
V INL
V
Input Leakage Current
(CLK/SEL, ONA, ONB,
ONL, TRACK)
1 µA
Internal Oscillator Frequency CLK/SEL = OUT 0.8 1.2 MHz
Oscillator Maximum Duty Cycle 79 90 %
Note 1: Operating voltage. Since the regulator is bootstrapped to the output, once started it will operate down to 0.7V input.
Note 2: The device is in startup mode when V
OUT is below this value (see Low-Voltage Startup Oscillator section). Do not apply full
load current.
Note 3: Supply current into the OUT and POUT pins. This current correlates directly to the actual battery-supply current, but is
reduced in value according to the step-up ratio and efficiency.
Note 4: Minimum recommended ISET voltage in normal mode is 0.625V.
Note 5: ONA, ONB, ONL have hysteresis of approximately 0.15
✕ V OUT .
Note 6: Specifications to -40°C are guaranteed by design and not production tested.