MAX868 Maxim, MAX868 Datasheet - Page 3

• Manufacturer Part Number: MAX868
• Description: Regulated / Adjustable -2x Inverting Charge Pump
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS
(V
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
(Circuit of Figure 5, T
__________________________________________Typical Operating Characteristics
Supply-Voltage Range
Supply Current
Shutdown Current
Oscillator Frequency
Open-Loop Output
Resistance
FB Trip Point
FB Input Bias Current
SHDN Input Threshold
SHDN Input Bias Current
IN
-10
-15
-20
-25
-30
-35
= +3.3V, C1 = C2 = 0.22µF, C
-5
5
0
PARAMETER
0
5
V
LOAD-REGULATION ERROR
10 15 20 25
OUT
vs. LOAD CURRENT
= -7.5V
LOAD CURRENT (mA)
(V
_______________________________________________________________________________________
A
V
OUT
IN
= +25°C, unless otherwise noted.)
= 5V)
= -3.3V
30 35 40 45 50
V
SYMBOL
I
OUT
IN,SHDN
R
f
OSC
V
V
V
= -5V
I
OUT
IN
IN
IH
IL
IN
= 1µF, C
R
No load, V
No load, SHDN = GND
V
I
SHDN = GND (OUT pulls to GND)
V
V
V
V
OUT
FB
IN
IN
IN
IN
L
= 3kΩ to GND
= 1.8V to 5.5V
= 1.8V to 5.5V
= 1.8V to 5.5V
= 5.5V, SHDN = IN or GND
= 50mV
OUT
= 5mA, FB = IN
-12
-15
-9
-3
-6
0
3
= 10µF, T
FB
0
= -50mV
LOAD-REGULATION ERROR
5
A
CONDITIONS
vs. LOAD CURRENT
Regulated, Adjustable -2x
= -40°C to +85°C, unless otherwise noted. (Note 1)
LOAD CURRENT (mA)
(V
V
10
OUT
IN
V
OUT
= 3.3V)
= -5V
Inverting Charge Pump
= -3.3V
15
20
25
500
490
480
470
460
450
440
430
420
410
400
0.3V
-100
-100
-40
MIN
270
-40
1.8
MAXIMUM SWITCHING FREQUENCY
IN
-20
V
vs. TEMPERATURE
IN
TYP
0
V
TEMPERATURE (°C)
= 3.3V
IN
= 2V
V
20
IN
= 5V
0.7V
MAX
40
630
125
100
100
5.5
55
50
40
1
IN
60
FB = IN
UNITS
80
kHz
mV
µA
µA
nA
nA
Ω
V
V
100
3