Rainbow Electronics MAX1853 - Manual (Page 4)

MAX1852/MAX1853
4 _______________________________________________________________________________________
SC70 Inverting Charge Pumps
with Shutdown
50
53
52
51
55
54
59
58
57
56
60
-40 -20 0 20 40 60 80
MAX1852
CHARGE-PUMP FREQUENCY
vs. TEMPERATURE
MAX1852/3 toc10
TEMPERATURE ( °C)
FREQUENCY (kHz)
200
210
205
215
225
220
230
-40 -20 0 20 40 60 80
MAX1853
CHARGE-PUMP FREQUENCY
vs. TEMPERATURE
MAX1852/3 toc11
TEMPERATURE ( °C)
FREQUENCY (kHz)
20
120
70
170
220
270
2.0 3.5 4.0 2.5 3.0 4.5 5.0 5.5
CHARGE-PUMP FREQUENCY
vs. INPUT VOLTAGE
MAX1852/3 toc12
INPUT VOLTAGE (V)
FREQUENCY (kHz)
MAX1853
MAX1852
-5.5
-4.5
-5.0
-3.5
-4.0
-2.5
-3.0
-2.0
2.0 3.0 3.5 2.5 4.0 4.5 5.0 5.5
MAX1852 AND MAX1853
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1852/3 toc13
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
I LOAD = 10mA
2 µs/div
I LOAD = 10mA, AC-COUPLED
MAX1853
OUTPUT NOISE AND RIPPLE
MAX1852/3 toc16
V OUT
20mV/div
C1 = C2 = 1 µF
0
100
50
200
150
300
250
350
0.2 2.2 1.2 3.2 4.2 0.7 2.7 1.7 3.7 4.7
OUTPUT VOLTAGE RIPPLE
vs. CAPACITANCE
MAX1852/3 toc14
CAPACITANCE ( µF)
OUTPUT VOLTAGE RIPPLE (mV)
MAX1853
C1 = C2
I
LOAD = 10mA
MAX1852
10 µs/div
I
LOAD
= 10mA, AC-COUPLED
MAX1852
OUTPUT NOISE AND RIPPLE
MAX1852/3 toc15
V OUT
20mV/div
C1 = C2 = 4.7 µF
100 µs/div
MAX1852
STARTUP FROM SHUTDOWN
MAX1852/3 toc17
SHDN
0
0
V
OUT
2V/div
40 µs/div
MAX1853
STARTUP FROM SHUTDOWN
MAX1852/3 toc18
SHDN
0
0
V OUT
2V/div
Typical Operating Characteristics (continued)
(Circuit of Figure 1, capacitors from Table 2, V IN = +5V, SHDN = IN, T
A
= +25°C, unless otherwise noted.)