MAX8614AETD+T Maxim Integrated Products, MAX8614AETD+T Datasheet

IC DC-DC CONV DL CCD 14TDFN

MAX8614AETD+T

Manufacturer Part Number
MAX8614AETD+T
Description
IC DC-DC CONV DL CCD 14TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8614AETD+T

Applications
Converter, CCD
Voltage - Input
2.7 ~ 5.5 V
Number Of Outputs
2
Voltage - Output
Adjustable up to 24V, Adjustable down to -10V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-4014; Rev 1; 9/06
True Shutdown is a trademark of Maxim Integrated Products, Inc.
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.
TOP VIEW
CCD Bias Supplies and OLED Displays
Digital Cameras
Camcorders and Portable Multimedia
PDAs and Smartphones
14
+
1
________________________________________________________________ Maxim Integrated Products
13
2
General Description
12
MAX8614A
MAX8614B
3
TDFN
11
4
Pin Configuration
10
5
6
9
Applications
7
8
Dual-Output (+ and -) DC-DC
o Dual Output Voltages (+ and -)
o Adjustable Up to +24V and Down to -10V at 5.5V
o Output Short/Overload Protection
o True Shutdown on Both Outputs
o Controlled Inrush Current During Soft-Start
o Selectable Power-On Sequencing
o Up to 90% Efficiency
o 1µA Shutdown Current
o 1MHz Fixed-Frequency PWM Operation
o Fault-Condition Flag
o Thermal Shutdown
o Small, 3mm x 3mm, 14-Pin TDFN Package
+Denotes lead-free package.
MAX8614AETD+
MAX8614BETD+
(2.7V TO 5.5V)
PART
INPUT
AV
Converters for CCD
CC
Typical Operating Circuit
-40°C to
-40°C to
RANGE
ONINV
ONBST
AV
REF
SEQ
FLT
+85°C
+85°C
TEMP
CC
GND
V
CC
MAX8614A
MAX8614B
Ordering Information
PGND
PIN-
PACKAGE
14 TD FN
3m m x 3m m
( T1433- 2)
14 TD FN
3m m x 3m m
( T1433- 2)
LXN
FBN
PVP
FBP
LXP
MARK
ABG
TOP
ABH
Features
BST/
0.44/
0.33
0.75
0.8/
ILIM
INV
-7.5V
+15V
V
V
INV
BST
T1433+
T1433+
C O D E
PK G
REF
IN
1

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MAX8614AETD+T Summary of contents

Page 1

... TDFN package and are specified over the -40°C to +85°C extended temperature range. 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 ...

Page 2

Dual-Output (+ and -) DC-DC Converters for CCD ABSOLUTE MAXIMUM RATINGS GND ...................................................-0. LXN to V ............................................................. -18V to +0.3V CC LXP to PGND ..........................................................-0.3V to +33V REF, ONINV, ONBST, SEQ, FBN, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3.6V, PGND = SEQ = GND 0.22µ 2.2µ 4.7µF, Figure AVCC ONINV = ONBST unless otherwise noted. Typical values are at ...

Page 4

Dual-Output (+ and -) DC-DC Converters for CCD ELECTRICAL CHARACTERISTICS ( AVCC ONINV = ONBST EN to +85°C, unless otherwise noted.) (Note 3) PARAMETER Voltage Range VCC CC UVLO ...

Page 5

3.6V, SEQ = GND, Figure 1, unless otherwise noted AVCC MAXIMUM OUTPUT CURRENT vs. INPUT VOLTAGE 350 300 V = 10V OUT 250 200 V = 15V OUT 150 100 50 ...

Page 6

Dual-Output (+ and -) DC-DC Converters for CCD (T = +25° 3.6V, SEQ = GND, Figure 1, unless otherwise noted AVCC CHANGE IN OUTPUT VOLTAGE vs. LOAD CURRENT (POSITIVE OUTPUT ...

Page 7

3.6V, SEQ = GND, Figure 1, unless otherwise noted AVCC LOAD TRANSIENT (POSITIVE OUTPUT) V INV V BST I BST 20mA TO 50mA TO 20mA 4µs/div SWITCHING WAVEFORMS (POSITIVE OUTPUT) V ...

Page 8

Dual-Output (+ and -) DC-DC Converters for CCD (T = +25° 3.6V, SEQ = GND, Figure 1, unless otherwise noted AVCC REFERENCE VOLTAGE vs. TEMPERATURE 1.2490 1.2485 1.2480 1.2475 1.2470 1.2465 1.2460 1.2455 1.2450 ...

Page 9

ONBST ONINV FLT CONTROL SEQ AV CC GND Detailed Description The MAX8614A/MAX8614B generate both a positive and negative output voltage by combining a step-up and an inverting DC-DC converter on one IC. Both the step-up converter and the inverter share ...

Page 10

Dual-Output (+ and -) DC-DC Converters for CCD The inverter generates output voltages down to -16V below internal power switch and external catch CC diode allow conversion efficiencies as high as 85%. Control Scheme Both converters use ...

Page 11

Current-Limit Select The MAX8614B allows an inductor current limit of 0.8A on the step-up converter and 0.75A on the inverter. The MAX8614A allows an inductor ...

Page 12

Dual-Output (+ and -) DC-DC Converters for CCD Table 1. Inductor Selection Guide OUTPUT VOLTAGES AND LOAD CURRENT TOKO DB3018C, 1069AS-2R0 TOKO DB3018C, 1069AS-4R3 TOKO 15V, 50mA S1024AS-4R3M -7.5V, 100mA Sumida CDRH2D14-4R7 TOKO S1024AS-100M Sumida CDRH2D11-100 15V, 20mA Sumida -7.5V, ...

Page 13

V BATT (2.7V ~ 5V) V BATT R5 100kΩ FAULT Figure 1. Typical Application Circuit It is important to connect the GND pin, the input bypass-capacitor ground lead, and the output filter capacitor ground lead to a single point (star ...

Page 14

Dual-Output (+ and -) DC-DC Converters for CCD (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 14 ______________________________________________________________________________________ Package Information ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2006 Maxim Integrated Products ...

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