MAX8614A Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Dual-Output (+ and -) DC-DC

19-4014; Rev 0; 3/06
Dual-Output (+ and -) DC-DC
Converters for CCD
General Description
The MAX8614A/MAX8614B dual-output step-up DC-DC
converters generate both a positive and negative sup-
ply voltage that are each independently regulated. The
positive output delivers up to 50mA while the inverter
supplies up to 100mA with input voltages between 2.7V
and 5.5V. The MAX8614A/MAX8614B are ideal for pow-
ering CCD imaging devices and displays in digital
cameras and other portable equipment.
The MAX8614A/MAX8614B generate an adjustable
positive output voltage up to +24V and a negative out-
put down to 16V below the input voltage. The
MAX8614B has a higher current limit than the
MAX8614A. Both devices operate at a fixed 1MHz fre-
quency to ease noise filtering in sensitive applications
and to reduce external component size.
Additional features include pin-selectable power-on
sequencing for use with a wide variety of CCDs, True
Shutdown™, overload protection, fault flag, and internal
soft-start with controlled inrush current.
The MAX8614A/MAX8614B are available in a space-
saving 3mm x 3mm 14-pin TDFN package and
are specified over the -40°C to +85°C extended
temperature range.
Applications
CCD Bias Supplies and OLED Displays
Digital Cameras
Camcorders and Portable Multimedia
PDAs and Smartphones
True Shutdown is a trademark of Maxim Integrated Products, Inc.
Pin Configuration
TOP VIEW
14 13 12 11 10 9 8
MAX8614A
MAX8614B
+
1234567
TDFN
Features
♦ Dual Output Voltages (+ and -)
♦ Adjustable Up to +24V and Down to -10V at 5.5V_IN
♦ Output Short/Overload Protection
♦ True Shutdown on Both Outputs
♦ Controlled Inrush Current During Soft-Start
♦ Selectable Power-On Sequencing
♦ Up to 90% Efficiency
♦ 1µA Shutdown Current
♦ 1MHz Fixed-Frequency PWM Operation
♦ Fault-Condition Flag
♦ Thermal Shutdown
♦ Small, 3mm x 3mm, 14-Pin TDFN Package
Ordering Information
PART
TEMP PIN-
TOP
ILIM
RANGE PACKAGE MARK BST/INV
MAX8614AETD+
-40°C to
+85°C
14 TDFN
3mm x 3mm
(T1433-2)
ABG
0.44/0.33
MAX8614BETD+
-40°C to
+85°C
14 TDFN
3mm x 3mm
(T1433-2)
+Denotes lead-free package.
ABH
0.8/0.75
Typical Operating Circuit
INPUT
(2.7V TO 5.5V)
V_CC
ONINV
LXN
ONBST
AV_CC
MAX8614A
MAX8614B _FBN
REF
PVP
AV_CC
SEQ
LXP
FLT
GND PGND
FBP
V_INV
-7.5V
REF
V_BST
+15V
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.