Rainbow Electronics MAX685 - Manual (Page 3)

MAX685
Dual-Output (Positive and Negative),
DC-DC Converter for CCD and LCD
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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.)
ELECTRICAL CHARACTERISTICS
(V DD , VP = 5V, T A = -40°C to +85°C unless otherwise noted.) (Note 2)
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.
V DD = 5.5V (Note 1)
V DD = VP
No load
V DD = rising
V IN = 4.5V, V OUT+
≥
14.25V, V OUT-
≤
-7.125V,
Figure 3
SYNC = GND
SYNC = SEQ = SHDN = GND
CONDITIONS
V -9 -1.27 Negative Output Voltage Range
V VP 24
V 2.7 5.5 Input Voltage Range
Positive Output Voltage Range
V 1.205 1.275 FBP Threshold Voltage
V 2.35 2.65 UVLO Threshold
mA 10 Maximum Output Current
µA 500 Idle Quiescent Current
µA 10 Shutdown Supply Current
UNITS MIN MAX PARAMETER
CONDITIONS
SYNC = V DD
SYNC = GND
kHz
320 400 480
Oscillator Frequency (internal)
175 220 265
kHz 200 480 Sync Frequency Range (external)
I POK = 2mA
FBN falling
FBP rising
V 0.4 POK Output Low Voltage
mV
UNITS MIN TYP MAX
54 79 108
PARAMETER
FBN POK Threshold
V 1.090 1.122 1.150 FBP POK Threshold
V POK = 10V µA 1 POK Output Off Current
2.7V < V DD
≤
5.5V
No load
V 0.3 x V DD Logic-Low Input
mV -20 40 FBN Threshold Voltage
2.7V < V DD
≤
5.5V V 0.7 x V DD Logic-High Input
FBP rising V 1.090 1.150 FBP POK Threshold
FBN falling mV 54 108 FBN POK Threshold
SYNC INPUT
POK COMPARATORS
No load V 1.225 1.275 VREF Output Voltage
SHUTDOWN
UNDERVOLTAGE LOCKOUT
FB INPUTS AND REFERENCE VOLTAGE
LOGIC INPUTS (SEQ, SHDN, SYNC)
POK COMPARATORS