Dual-Output (Positive and Negative),
DC-DC Converter for CCD and LCD
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= VP = 5V,
T
A
= 0°C to +85°C
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYNC INPUT
Sync Frequency Range (external)
Oscillator Frequency (internal)
POK COMPARATORS
FBP POK Threshold
FBN POK Threshold
POK Output Low Voltage
POK Output Off Current
FBP rising
FBN falling
I
POK
= 2mA
V
POK
= 10V
1.090
54
1.122
79
1.150
108
0.4
1
V
mV
V
µA
SYNC = GND
SYNC = V
DD
200
175
320
220
400
480
265
480
kHz
kHz
CONDITIONS
MIN
TYP
MAX
UNITS
MAX685
ELECTRICAL CHARACTERISTICS
(V
DD
, VP = 5V,
T
A
= -40°C to +85°C
unless otherwise noted.) (Note 2)
PARAMETER
Input Voltage Range
Positive Output Voltage Range
Negative Output Voltage Range
Maximum Output Current
Idle Quiescent Current
SHUTDOWN
Shutdown Supply Current
UNDERVOLTAGE LOCKOUT
UVLO Threshold
FBP Threshold Voltage
FBN Threshold Voltage
VREF Output Voltage
LOGIC INPUTS
(SEQ,
SHDN,
SYNC)
Logic-Low Input
Logic-High Input
POK COMPARATORS
FBP POK Threshold
FBN POK Threshold
FBP rising
FBN falling
1.090
54
1.150
108
V
mV
2.7V < V
DD
≤
5.5V
2.7V < V
DD
≤
5.5V
0.7 x V
DD
0.3 x V
DD
V
V
V
DD
= rising
No load
No load
No load
2.35
1.205
-20
1.225
2.65
1.275
40
1.275
V
V
mV
V
FB INPUTS AND REFERENCE VOLTAGE
SYNC = SEQ =
SHDN
= GND
10
µA
V
DD
= 5.5V (Note 1)
V
IN
= 4.5V, V
OUT+
≥
14.25V, V
OUT-
≤
-7.125V,
Figure 3
SYNC = GND
V
DD
= VP
CONDITIONS
MIN
2.7
VP
-9
10
500
MAX
5.5
24
-1.27
UNITS
V
V
V
mA
µA
Note 1:
Negative output voltage can be larger magnitude for lower values of V
DD
. The voltage between V
DD
and V
OUT-
must not
exceed 14.5V.
Note 2:
Specifications to -40°C are guaranteed by design, not production tested.
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
