MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
4
Maxim Integrated
ELECTRICAL CHARACTERISTICS
(V
CC
= V
AVCC
= V
ONINV =
V
ONBST
= V
EN
= 3.6V, PGND = SEQ = GND, C6 = 0.22µF, C1 = 2.2µF, C2 = 6.7µF, Figure 1, T
A
= -40°C
to +85°C, unless otherwise noted.) (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
AVCC = V
CC
Voltage Range (Note 1) 3 5.5 V
UVLO Threshold V
CC
rising 2.42 2.82 V
Step-Up Output Voltage Adjust Range V
AVCC
24 V
Inverter Output Voltage Adjust Range V
INV
- V
CC
(Note 2) -16 0 V
MAX8614B 0.7 0.9
LXP Current Limit
MAX8614A 0.34 0.52
A
MAX8614B 0.9 1.2
LXP Short-Circuit Current Limit
MAX8614A 0.52 0.70
A
MAX8614B 0.65 0.85
LXN Current Limit
MAX8614A 0.28 0.38
A
LXN On-Resistance V
CC
= 3.6V 1.1
PVP On-Resistance V
CC
= 3.6V 0.3
Maximum Duty Cycle Step-up and inverter 82 %
I
AVCC
1.4
Quiescent Current (Switching, No Load)
I
VCC
3
mA
I
AVCC
800
Quiescent Current (No Switching, No Load)
I
VCC
15
μA
Oscillator Frequency 0.93 1.07 MHz
FBP, FBN, REFERENCE
REF Output Voltage No load 1.235 1.260 V
FBP Threshold Voltage No load 0.995 1.025 V
FBN Threshold Voltage No load -10 +10 mV
ONINV, ONBST SEQ LOGIC INPUTS
Logic-Low Input 2.7V < V
AVCC
< 5.5V 0.5 V
Logic-High Input 2.7V < V
AVCC
< 5.5V 1.6 V
Note 1: Output current and on-resistance are specified at 3.6V input voltage. The IC operates to 2.7V with reduced performance.
Note 2: The specified maximum negative output voltage is referred to V
CC
, and not to GND. With V
CC
= 3.3V, the maximum negative
output is then -12.7V.
Note 3: Specifications to -40°C are guaranteed by design, not production tested.
