User guide

MAX17067
Low-Noise Step-Up DC-DC Converter
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ELECTRICAL CHARACTERISTICS
(V
IN
= SHDN = 3V, FREQ = 3V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= SHDN = 3V, FREQ = 3V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CONTROL INPUTS
Input Low Voltage V
IL
SHDN, FREQ, V
IN
= 2.6V to 4.0V
0.3 x
V
IN
V
Input High Voltage V
IH
SHDN, FREQ, V
IN
= 2.6V to 4.0V
0.7 x
V
IN
V
Hysteresis SHDN, FREQ
0.1 x
V
IN
V
FREQ Pulldown Current I
FREQ
3 6 9 μA
SHDN = GND, T
A
= +25°C -1 +1
SHDN Input Current I
SHDN
SHDN = GND, T
A
= +85°C 0
μA
Temperature rising 160
Thermal Shutdown
Hysteresis 20
°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Supply Range V
IN
V
OUT
< 18V 2.6 4.0 V
Output Voltage Range 18 V
Input Supply Clamp Voltage
Use external limiting resistor;
R
IN
= 100, V
IN
= 10V (Note 3)
6.03 6.60 V
V
IN
Undervoltage Lockout UVLO
V
IN
rising, typical hysteresis is 80mV, LX
remains off below this level
2.30 2.57 V
V
FB
= 1.3V, not switching 0.6
Quiescent Current I
IN
V
FB
= 1.0V, switching 2.5
mA
ERROR AMPLIFIER
Feedback Voltage V
FB
Level to produce V
COMP
= 1.24V 1.227 1.253 V
FB Input Bias Current I
FB
V
FB
= 1.24V 200 nA
Feedback-Voltage Line
Regulation
Level to produce V
COMP
= 1.24V,
2.6V < V
IN
< 4.0V
0.15 %/V
Transconductance g
m
I = 5μA 100 440 μS
OSCILLATOR
FREQ = GND
450 830
Frequency f
OSC
FREQ = IN 950 1500
kHz
Maximum Duty Cycle DC FREQ = GND, FREQ = V
IN
89 95 %