MAX8614BETD+-MAX8614BETD+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX8614BETD+ ,Dual-Output (+ and -) DC-DC Converters for CCDApplicationsMAX8614BETD/V+ AKT +85°C 0.75 CCD Bias Supplies and OLED Displays+Denotes a lead(Pb)-fr ..
MAX8614BETD+ ,Dual-Output (+ and -) DC-DC Converters for CCDELECTRICAL CHARACTERISTICS(V = V = V V = 3.6V, PGND = SEQ = GND, C6 = 0.22µF, C1 = 2.2µF, C2 = 4.7µ ..
MAX8614BETD+T ,Dual-Output (+ and -) DC-DC Converters for CCDFeatures♦ Dual Output Voltages (+ and -)The MAX8614A/MAX8614B dual-output step-up DC-DCconverters g ..
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MAX8614BETD+-MAX8614BETD+T
Dual-Output (+ and -) DC-DC Converters for CCD
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
EVALUATION KIT AVAILABLE
General Description
The MAX8614A/MAX8614B dual-output step-up DC-DC
converters generate both a positive and negative
supply 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 powering 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
output down to 16V below the input voltage. The
MAX8614B has a higher current limit than the
MAX8614A. Both devices operate at a fixed 1MHz
frequency to ease noise filtering in sensitive applica-
tions 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
FeaturesDual Output Voltages (+ and -)Adjustable Up to +24V and Down to -10V at 5.5VINOutput Short/Overload ProtectionTrue Shutdown on Both OutputsControlled Inrush Current During Soft-StartSelectable Power-On SequencingUp to 90% Efficiency1µA Shutdown Current1MHz Fixed-Frequency PWM OperationFault-Condition FlagThermal ShutdownSmall, 3mm x 3mm, 14-Pin TDFN Package13121110984567
LXNV
PVPPGND
REF
AVCC
FBN
ONBST
TOP VIEW
MAX8614A
MAX8614B
LXPONINVSEQ
FBP
FLT
GND
TDFN
Pin ConfigurationLXN
VCC
INPUT
(2.7V TO 5.5V)
REF
AVCC
AVCC
FBN
ONINVVINV
-7.5V
MAX8614A
MAX8614B
GNDPGND
ONBST
PVP
LXP
FBP
VBST
+15V
REF
SEQ
FLT
Typical Operating Circuit
Ordering Information
PARTTEMP
RANGE
PIN-
PACKAGE
TOP
MARK
ILIM
BST/
INV
MAX8614AETD+ -40°C to
+85°C 14 TDFN ABG 0.44/
0.33
MAX8614BETD+ -40°C to
+85°C
14 TDFN ABH 0.8/
0.75
MAX8614BETD/V+ -40°C to
+85°C
14 TDFN AKT 0.8/
0.75
True Shutdown is a trademark of Maxim Integrated Products, Inc.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part that conforms to AEC-Q100.
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC, AVCC to GND..................................................-0.3V to +6V
LXN to VCC.............................................................-18V to +0.3V
LXP to PGND..........................................................-0.3V to +33V
REF, ONINV, ONBST, SEQ, FBN, FBP
FLTto GND.........................................-0.3V to (AVCC + 0.3)V
PVP to GND................................................-0.3V to (VCC+ 0.3)V
AVCCto VCC.........................................................-0.3V to +0.3V
PGND to GND.......................................................-0.3V to +0.3V
Continuous Power Dissipation (TA= +70°C Multilayer Board)
14-Pin 3mm x 3mm TDFN (derate 18.2mW/°C above = +70°C)............................................................1454.4mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(VCC= VAVCC= VONINV = VONBST= 3.6V, PGND = SEQ = GND, C6 = 0.22µF, C1 = 2.2µF, C2= 4.7µF, Figure 1, TA= 0°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERCONDITIONSMINTYPMAXUNITS
AVCC and VCC Voltage Range (Note 1) 2.7 5.5 V
UVLO Threshold VCC rising 2.42 2.55 2.66 V
UVLO Hysteresis 25 mV
Step-Up Output-Voltage Adjust Range VAVCC 24 V
Inverter Output-Voltage Adjust Range VINV - VCC (Note 2) -16 0 V
MAX8614B 0.7 0.8 0.9 LXP Current Limit MAX8614A 0.34 0.44 0.52 A
MAX8614B 0.90 1.05 1.20 LXP Short-Circuit Current Limit MAX8614A 0.52 0.61 0.70 A
MAX8614B 0.65 0.75 0.85 LXN Current Limit MAX8614A 0.28 0.33 0.38 A
LXN On-Resistance VCC= 3.6V 0.6 1.1
LXP On-Resistance VCC= 3.6V 0.625
PVP On-Resistance VCC= 3.6V 0.15 0.3
Maximum Duty Cycle Step-up and inverter 82 90 %
IAVCC 0.75 1.4 Quiescent Current (Switching, No Load) IVCC 2 3 mA
IAVCC 400 800 Quiescent Current (No Switching, No Load) IVCC 8 15 μA = +25°C 0.1 5 Shutdown Supply Current TA= +85°C 0.1 μA
FBP Line Regulation VCC= 2.7V to 5.5V -20 mV/D
FBN Line Regulation VCC= 2.7V to 5.5V 20 mV/
(D - 0.5)
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
ELECTRICAL CHARACTERISTICS (continued)
(VCC= VAVCC= VONINV = VONBST= 3.6V, PGND = SEQ = GND, C6 = 0.22µF, C1 = 2.2µF, C2= 4.7µF, Figure 1, TA= 0°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERCONDITIONSMINTYPMAXUNITS
ILXP = IILIMMIN, MAX8614B -15 FBP Load Regulation ILXP = IILIMMIN, MAX8614A -35 mV/A
ILXN = IILIMMIN, MAX8614B 17.5 FBN Load Regulation ILXN = IILIMMIN, MAX8614A 65 mV/A
Oscillator Frequency 0.93 1 1.07 MHz
Soft-Start Interval Step-up and inverter 10 ms
Overload-Protection Fault Delay 100 ms
FBP, FBN, REFERENCE
REF Output Voltage No load 1.24 1.25 1.26 V
REF Load Regulation 0μA < IREF < 50μA 10 mV
REF Line Regulation 3.3V < VAVCC < 5.5V 2 5 mV
FBP Threshold Voltage No load 0.995 1.010 1.025 V
FBN Threshold Voltage No load -10 0 +10 mV = +25°C -50 +5 +50 FBP Input Leakage Current VFBP =1.025V TA= +85°C +5 nA = +25°C -50 +5 +50 FBN Input Leakage Current FBN= -10mV TA= +85°C +5 nA = +25°C -5 +0.1 +5 LXN Input Leakage Current VLXN = -12V TA= +85°C +0.1 μA = +25°C -5 +0.1 +5 LXP Input Leakage Current VLXP = 23V TA= +85°C +0.1 μA = +25°C -5 +0.1 +5 PVP Input Leakage Current VPVP = 0V TA= +85°C +0.1 μA = +25°C -1 +0.1 +1 FLT Input Leakage Current VFLT = 3.6V TA= +85°C +0.1 μA
FLT Input Resistance Fault mode, TA= +25°C 10 20
ONINV, ONBST, SEQ LOGIC INPUTS
Logic-Low Input 2.7V < VAVCC< 5.5V 0.5 V
Logic-High Input 2.7V < VAVCC < 5.5V 1.6 V
Bias Current TA= +25°C 0.1 1 μA
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
ELECTRICAL CHARACTERISTICS
(VCC= VAVCC= VONINV = VONBST= VEN= 3.6V, PGND = SEQ = GND, C6 = 0.22µF, C1 = 2.2µF, C2= 6.7µF, Figure 1, TA= -40°C
to +85°C, unless otherwise noted.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
AVCC = VCC Voltage Range (Note 1) 3 5.5 V
UVLO Threshold VCC rising 2.42 2.82 V
Step-Up Output Voltage Adjust Range VAVCC 24 V
Inverter Output Voltage Adjust Range VINV - VCC (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
MAX8614B 0.65 0.85 LXN Current Limit MAX8614A 0.28 0.38 A
LXN On-Resistance VCC= 3.6V 1.1
PVP On-Resistance VCC= 3.6V 0.3
Maximum Duty Cycle Step-up and inverter 82 %
IAVCC 1.4 Quiescent Current (Switching, No Load) IVCC 3 mA
IAVCC 800 Quiescent Current (No Switching, No Load) IVCC 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 < VAVCC< 5.5V 0.5 V
Logic-High Input 2.7V < VAVCC < 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 VCC, and not to GND. With VCC= 3.3V, the maximum negative
output is then -12.7V.
Note 3:Specifications to -40°C are guaranteed by design, not production tested.
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAX8614A/B toc01
VOUT = 20V
VOUT = 15V
VOUT = 10V
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA) .
MAX8614A/B toc02
VINV = -10V
VINV = -7.5V
VINV = -5V
POSITIVE OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc03
L = 2.2μH, C = 2.2μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
POSITIVE OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc04
L = 10μH, C = 10μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
NEGATIVE OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc05
L = 4.7μH, C = 4.7μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
NEGATIVE OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc06
L = 10μH, C = 10μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc07
BOTH OUTPUTS LOADED EQUALLY
L1 = 2.2μH, C1 = 2.2μF, L2 = 4.7μH, C2 = 4.7μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
OUTPUT EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
MAX8614A/B toc08
BOTH OUTPUTS LOADED EQUALLY
L1 = 10μH, C1 = 10μF, L2 = 10μH, C2 = 10μF
VCC = 3V
VCC = 3.6V
VCC = 4.2V
VCC = 5V
Typical Operating Characteristics
(TA= +25°C, VCC= VAVCC= 3.6V, SEQ = GND, Figure 1, unless otherwise noted.)
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
CHANGE IN OUTPUT VOLTAGE
vs. OUTPUT CURRENT (NEGATIVE OUTPUT)
OUTPUT CURRENT (mA)
CHANGE IN OUTPUT VOLTAGE (%)
MAX8614A/B toc10255075100125
VIN = 5V
VOUT- = -7.5V
VIN = 4.2V
VIN = 3V
VIN = 3.6V
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
SUPPLY CURRENT (
MAX8614A/B toc11
AVCC
VCC
SOFT-START WAVEFORMS
MAX8614A/B toc12
VONINV
5V/div
10V/div
5V/div
100mA/div
VONBST
VBST
VINV
IIN
4ms/div
SEQ = GND
SOFT-START WAVEFORMS
MAX8614A/B toc13
VONINV
5V/div
10V/div
5V/div
100mA/div
VONBST
VBST
VINV
IIN
4ms/div
SEQ = AVCC
LINE TRANSIENT
MAX8614A/B toc14
50mV/div
AC-COUPLED
50mV/div
AC-COUPLED
3.5V
VBST
VIN
3.5V TO 4.5V
TO 3.5V
VINV
40μs/div
Typical Operating Characteristics (continued)
(TA= +25°C, VCC= VAVCC= 3.6V, SEQ = GND, Figure 1, unless otherwise noted.)
CHANGE IN OUTPUT VOLTAGE
vs. LOAD CURRENT (POSITIVE OUTPUT)
LOAD CURRENT (mA)
CHANGE IN OUTPUT VOLTAGE (%)
MAX8614A/B toc09255075100125150
VCC = 3V
VCC = 5V
VCC = 4.2V
VCC = 3.6V
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
LOAD TRANSIENT (NEGATIVE OUTPUT)
MAX8614A/B toc16
50mV/div
AC-COUPLED
100mV/div
AC-COUPLED
50mA/div
VBST
IINV
VINV
4μs/div
20mA TO 100mA
TO 20mA
SWITCHING WAVEFORMS (POSITIVE OUTPUT)
MAX8614A/B toc17
50mV/div
AC-COUPLED
10V/div
500mA/div
VBST
ILX
VLX
400ns/div
IBST = 20mA
SWITCHING WAVEFORMS (POSITIVE OUTPUT)
MAX8614A/B toc18
50mV/div
AC-COUPLED
10V/div
500mA/div
VBST
ILX
VLX
400ns/div
IBST = 50mA
SWITCHING WAVEFORMS (NEGATIVE OUTPUT)
MAX8614A/B toc19
50mV/div
AC-COUPLED
10V/div
500mA/div0A
VINV
ILX
VLX
400ns/div
IINV = 20mA
SWITCHING WAVEFORMS (NEGATIVE OUTPUT)
MAX8614A/B toc20
50mV/div
AC-COUPLED
10V/div
500mA/div
VINV
ILX
VLX
400ns/div
IINV = 100mA
LOAD TRANSIENT (POSITIVE OUTPUT)
MAX8614A/B toc15
20mV/div
AC-COUPLED
100mV/div
AC-COUPLED
20mA/div
VBST
IBST
VINV
4μs/div
20mA TO 50mA
TO 20mA
Typical Operating Characteristics (continued)
(TA= +25°C, VCC= VAVCC= 3.6V, SEQ = GND, Figure 1, unless otherwise noted.)
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
Typical Operating Characteristics (continued)
(TA= +25°C, VCC= VAVCC= 3.6V, SEQ = GND, Figure 1, unless otherwise noted.)
REFERENCE VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
MAX8614A/B toc21
SWITCHING FREQUENCY
vs. TEMPERATURE
TEMPERATURE (°C)
FREQUENCY (kHz)
MAX8614A/B toc22
VBST = +15V
IOUT = 50mA
VINV = -7.5V
IOUT = 100mA
PINNAMEFUNCTION
1 ONBST Enable Logic Input. Connect ONBST to AVCC for automatic startup of the step-up converter, or use ONBST
as an independent control of the step-up converter.
2 FBN Negative Output Feedback Input. Connect a resistor-divider between the negative output and REF with the
center to FBN to set the negative output voltage. AVCC Bias Supply. AVCC powers the IC. AVCC must be connected to VCC.REF 1.25V Reference Voltage Output. Bypass with a 0.22μF ceramic capacitor to GND. GND Ground. Connect GND to PGND with a short trace. FLT Fault Open-Drain Output. Connect a 100k resistor from FLT to AVCC. FLT is active low during a fault
event and is high impedance in shutdown.
7 FBP Positive Output-Voltage Feedback Input. Connect a resistor-divider between the positive output and GND
with the center to FBP to set the positive output voltage. FBP is high impedance in shutdown.
8 SEQ Sequence Logic Input. When SEQ = low, power-on sequence can be independently controlled by ONBST
and ONINV. When SEQ = high, the positive output powers up before the negative output.
9 ONINV Enable Logic Input. Connect ONINV to AVCC for automatic startup of the inverter, or use ONINV as an
independent control of the inverter.
10 LXP Positive Output Switching Inductor Node. LXP is high impedance in shutdown.
11 PGND Power Ground. Connect PGND to GND with a short trace.
12 PVP True-Shutdown Load Disconnect Switch. Connect one side of the inductor to PVP and the other side to
LXP. PVP is high impedance in shutdown.
13 VCCPower Input Supply. VCC supplies power for the step-up and inverting DC-DC converters. VCC must be
connected to AVCC.
14 LXN Negative Output Switching Inductor Node. LXN is high impedance in shutdown. EP Exposed Pad. Connect exposed pad to ground.
Pin Description

Partno	Mfg	Dc	Qty	Available	Descript
MAX8614BETD+ \|MAX8614BETD	MAXIM	N/a	1659	avai	Dual-Output (+ and -) DC-DC Converters for CCD
MAX8614BETD+	N/A	N/a	2500	avai	Dual-Output (+ and -) DC-DC Converters for CCD
MAX8614BETD+T	MAIXM	N/a	2500	avai	Dual-Output (+ and -) DC-DC Converters for CCD