Datasheet

MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
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ELECTRICAL CHARACTERISTICS
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, V
OUT
= 3.6V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 7)
ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, V
OUT
= 3.6V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C,
unless otherwise noted.)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
N-channel
0.15 0.28
Switch On-Resistance
P-channel
0.25 0.45
Ω
N-Channel Current Limit 1.0
1.25
1.6 A
P-Channel Turn-Off Current CLK/SEL = GND 20 60
120
mA
REFERENCES
Reference Output Voltage I
REF
= 0
1.230 1.250 1.270
V
Reference Load Regulation -1µA < IREF < +50µA 5 15 mV
Reference Supply Rejection 2.5V < V
OUT
< 5V 0.2 5 mV
LOGIC INPUTS
CLK/SEL Input Low Level 2.5V ≤ V
OUT
≤ 5.5V
0.2 x
V
OUT
V
CLK/SEL Input High Level 2.5V ≤ V
OUT
≤ 5.5V
0.8 x
V
OUT
V
1.1V ≤ V
OUT
≤ 1.8V 0.2
ON, ON Input Low Level (Note 6)
1.8V ≤ V
OUT
≤ 5.5V 0.4
V
1.1V ≤ V
OUT
≤ 1.8V
V
OUT
- 0.2
ON, ON Input High Level (Note 6)
1.8V ≤ V
OUT
≤ 5.5V 1.6
V
Input Leakage Current
CLK/SEL, ON, ON (T
A
= +25°C,
MAX1760ETB, MAX1760HETB)
0.01
1µA
Minimum CLK/SEL Pulse Width
200
ns
Maximum CLK/SEL Rise/Fall Time
100
ns
PARAMETER CONDITIONS MIN MAX UNITS
DC-DC CONVERTER
Output Voltage
V
FB
< 0.1V, CLK/SEL = OUT, includes load
regulation for 0 < I
LX
< 0.55A
3.17 3.38 V
FB Regulation Voltage
Adjustable output, CLK/SEL = OUT, includes
load regulation for 0 < I
LX
< 0.55A
1.215 1.270 V
Internal Oscillator Frequency CLK/SEL = OUT 0.75 1.2 MHz
Oscillator Maximum Duty Cycle (Note 3) 80 90 %
Output Voltage Lockout Threshold Rising edge (Note 4) 2.00 2.30 V
Supply Current in Shutdown V
ON
= 3.6V 5 µA
No-Load Supply Current CLK/SEL = GND (Note 5) 185 µA
DC-DC SWITCHES
N-channel 0.28
Switch On-Resistance
P-channel 0.45
Ω