MAX1790 Maxim, MAX1790 Datasheet - Page 3

• Manufacturer Part Number: MAX1790
• Description: Low-Noise Step-Up DC-DC Converter
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS
(V
Note 1: Current limit varies with duty cycle due to slope compensation. See the Output Current Capability section.
Note 2: Specifications to -40°C are guaranteed by design and not production tested.
Input Supply Range
V
Quiescent Current
Shutdown Supply Current
ERROR AMPLIFIER
Feedback Voltage
FB Input Bias Current
Feedback-Voltage Line
Regulation
Transconductance
OSCILLATOR
Frequency
Maximum Duty Cycle
N-CHANNEL SWITCH
Current Limit
On-Resistance
Current-Sense Transresistance
CONTROL INPUTS
Input Low Voltage
Input High Voltage
IN
IN
= SHDN = 3V, FREQ = GND, T
Undervoltage Lockout
PARAMETER
_______________________________________________________________________________________
Low-Noise Step-Up DC-DC Converter
A
SYMBOL
UVLO
= -40°C to +85°C, unless otherwise noted.) (Note 2)
f
R
R
V
I
OSC
V
DC
V
I
g
V
I
I
LIM
FB
IN
IN
ON
FB
CS
IN
IH
m
IL
V
LX remains off below this level
V
V
SHDN = GND
Level to produce V
V
Level to produce V
2.6V < V
∆I = 5µA
FREQ = GND
FREQ = IN
FREQ = GND
V
I
SHDN, FREQ, V
SHDN, FREQ, V
LX
IN
FB
FB
FB
FB
= 1.2A
rising, typical hysteresis is 40mV,
= 1.3V, not switching
= 1.0V, switching
= 1.24V
= 1V, duty cycle = 65%
IN
< 5.5V
CONDITIONS
IN
IN
= 2.6V to 5.5V
= 2.6V to 5.5V
COMP
COMP
= 1.24V
= 1.24V,
0.7
1.215
2.25
MIN
490
900
2.6
1.2
0.3
70
78
·
V
IN
TYP
0.2
4
0.3
MAX
1500
2.52
0.35
1.26
0.15
0.65
260
770
5.5
2.3
0.5
10
40
92
·
5
V
IN
UNITS
µmhos
%/V
kHz
V/A
mA
µA
nA
%
Ω
V
V
V
A
V
V
3