ADP3607 Fast Delivery |IC PHOENIX CO.,LIMITED

ADP3607 ,50 mA Switched Capacitor Voltage Boost with Regulated OutputSpecifications subject to change without notice.1ABSOLUTE MAXIMUM RATINGSORDERING GUIDE(T = +25

ADP3607
50 mA Switched Capacitor Voltage Boost with Regulated Output
REV.0
50 mA Switched Capacitor
Voltage Boost with Regulated Output
FUNCTIONAL BLOCK DIAGRAM
CP–
GND
CP+OUTVSENSEIN
VOUT
5.0V
VIN
3.3V*CIN
4.7mF*CP
4.7mF
OFFON
*FOR BEST PERFORMANCE, 10mF IS RECOMMENDED
CP : SPRAGUE, 293D475X0010B2W
CIN, CO: TOKIN, 1E475ZY5UC205F
SD103
Figure 1.Typical Application Circuit
FEATURES
Fully Regulated Output Voltage (5 V and Adjustable)
Input Voltage Range From 3 V to 5 V
50 mA Output Current
Output Accuracy: 65%
High Switching Frequency: 250 kHz
SO-8 and TSSOP-8 Packages
–408C to +858C Ambient Temperature Range
APPLICATIONS
Computer Peripherals and Add-On Cards
Portable Instruments
Battery Powered Devices
Pagers and Radio Control Receivers
Disk Drives
Mobile Phones
GENERAL DESCRIPTION
The ADP3607 is a 50 mA regulated output switched capacitor
voltage doubler. It provides a regulated output voltage with
minimum voltage loss and requires a minimum number of ex-
ternal components. In addition, the ADP3607 does not require
the use of an inductor.
The internal oscillator of the ADP3607 runs at 500 kHz nomi-
nal frequency, which produces an output switching frequency of
250 kHz. This allows for the use of smaller charge pump and
filter capacitors.
The ADP3607 provides an accuracy of –5% with a typical shut-
down current of 150 mA. It can also operate from a single posi-
tive input voltage as low as 3 V. The ADP3607 is offered with
the regulation fixed at 5 V, or adjustable via external resistors
over a 3 V to 9 V range.
ADP3607–SPECIFICATIONS1, 2, 3
NOTESCapacitors CIN, CO and CP in the test circuit are 4.7 mF with 0.1 W ESR. Capacitors with higher ESR may reduce output voltage and efficiency.See Figure 1 conditions.All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.For the adjustable version, a 1% resistor should be used to maintain output voltage tolerance. For both device types, tolerances can be improved by >1% using larger
value and lower ESR capacitors for CO and CP.
Specifications subject to change without notice.
(VIN = 3.3 V @ TA = +258C, CP = CO = 4.7 mF unless otherwise noted.)
ABSOLUTE MAXIMUM RATINGS1
(TA = +25°C unless otherwise noted)
Input Voltage (VIN to GND) . . . . . . . . . . . . . . . . . . . .+7.5 V
Output Voltage (VOUT to GND) . . . . . . . . . . . . . . . . . .+12 V
Output Short Circuit Protection . . . . . . . . . . . . . . . . . . .1 secJA, SO-8 Package2 . . . . . . . . . . . . . . . . . . . . . . . . .150°C/WJA, TSSOP-8 Package2 . . . . . . . . . . . . . . . . . . . . . .208°C/W
Operating Temperature Range . . . . . . . . . . .–40°C to +85°C
Storage Temperature Range . . . . . . . . . . . .–65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . .+300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
NOTESThis is a stress rating only, operation beyond these limits can cause the device to be
permanently damaged.qJA is specified for worst case conditions with device soldered on a circuit board.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3607 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ORDERING GUIDE
*SO = Small Outline Package; RU = Thin Small Outline Package.
Contact the factory for the availability of other output voltage options.
Table I.Other Members of ADP360x Family1
ADP3604AR
ADP3605AR-3
NOTESSee individual data sheets for detailed ordering information.SO = Small Outline package.
Table II.Alternative Capacitor Technologies
Table III.Recommended Capacitor Manufacturers
Sprague
Nichicon
Mallory
TOKIN
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATION
NC = NO CONNECT
CP+
VIN
CP–
VOUT
GND
VSENSESD
ADP3607

SUPPLY VOLTAGE – Volts
OSCILLATOR FREQUENCY – kHz
270
Figure 2.Oscillator Frequency vs. Supply Voltage

TEMPERATURE – 8C
OUTPUT VOLTAGE – Volts
5.05
Figure 3.Output Voltage vs. Temperature

OUTPUT CURRENT – mA
AVERAGE INPUT CURRENT – mA1015
125253035404550
Figure 4.Average Input Current vs. Output Current
TEMPERATURE – 8C
SUPPLY CURRENT – mA
3.25
Figure 5.Supply Current vs. Temperature in Normal Mode
TEMPERATURE – 8C
OSCILLATOR FREQUENCY – kHz
300
Figure 6.Oscillator Frequency vs. Temperature
LOAD CURRENT – mA200100150175
OUTPUT VOLTAGE – Volts
125755025
Figure 7.Output Voltage vs. Load Current
–Typical Performance Characteristics
SUPPLY VOLTAGE – Volts
SUPPLY CURRENT –
300
Figure 11.Supply Current vs. Supply Voltage in
Shutdown Mode
LOAD CURRENT – mA
EFFICIENCY – %2010
Figure 12.Efficiency vs. Load Current Based on Circuit of
Figure 1

CH4 10.0mV
20.0mVCH49.0mV
VO = +5.0V
VO = +4.96V
IO = 50mA
IO = 1mA
M4.00ms
Figure 13.Load Transient Response Based on Circuit of
Figure 1
SUPPLY VOLTAGE – Volts
SUPPLY CURRENT – mA
3.7
Figure 8.Supply Current vs. Supply Voltage in
Normal Mode
TEMPERATURE – 8C
SUPPLY CURRENT –
240
Figure 9.Supply Current vs. Temperature in
Shutdown Mode
CH1 2.00V2.00V M2.00msCH2
1.12V
VO = +5.0V
VO = 0V
VIN = +3.3V
VIN = 0V
Figure 10.Start-up Under Full Load Based on Circuit of
Figure 1
ADP3607
THEORY OF OPERATION
The ADP3607 uses a switched capacitor principle to generate
a regulated boost voltage from a positive input voltage. An
on-board oscillator generates a two-phase clock to control a
switching network that transfers charge between the storage
capacitors. The switches turn on and off at a 250 kHz rate that
is generated from an internal 500 kHz oscillator. The basic
principle behind the voltage conversion scheme is illustrated in
Figures 14 and 15.S1VINVOUTS4CP
Figure 14.ADP3607 Switch Configuration Charging the
Pump Capacitor
During phase one, S1 and S3 are ON, charging the pump ca-
pacitor to the input voltage. Before the next phase begins, S1
and S3 are turned OFF, as are S2 and S4 to prevent any over-
lap. S2 and S4 are turned ON during the second phase (see
Figure 15) and charge stored in the pump capacitor is trans-
ferred to the output capacitor.VINVOUT
Figure 15.ADP3607 Switch Configuration Charging the
Output Capacitor
During the second phase, the negative terminal of the pump
capacitor is connected to VIN through variable resistance switch
S4, and the positive terminal is connected to the output, result-
ing in a voltage shift at the output terminal. The ADP3607
block diagram is shown on the front page.
TEMPERATURE – 8C
ESR –
0.1
Figure 16.ESR vs. Temperature
APPLICATION INFORMATION
Capacitor Selection
The ADP3607’s high internal oscillator frequency permits the
use of small capacitors for both the pump and the output ca-
When selecting the capacitors, keep in mind that not all manu-
facturers guarantee capacitor ESR in the range required by the
circuit. In general, the capacitor’s ESR is inversely proportional
to its physical size, so larger capacitance values and higher volt-
age ratings tend to reduce ESR. Since the ESR is also a function
of the operating frequency, when selecting a capacitor make sure
its value is rated at the circuit’s operating frequency. Another
factor affecting capacitor performance is temperature.
Figure 16 illustrates the temperature effect on various capaci-
tors. If the circuit has to operate at temperatures significantly
different from +25°C, the capacitance and ESR values must be
carefully selected to adequately compensate for the change.
Various capacitor technologies offer improved performance over
temperature; for example, certain tantalum capacitors provide
good low temperature ESR but at a higher cost. Table II pro-
vides the ratings for different types of capacitor technologies to
help the designer select the right capacitors for the application.
The exact values of CIN and CO are not critical. However, low
ESR capacitors such as solid tantalum and multilayer ceramic
capacitors are recommended to minimize voltage loss at high
currents. Table III shows a partial list of the recommended low
ESR capacitor manufacturers.
CAPACITANCE – mF020
OUTPUT RIPPLE – mV6080100120140
Figure 17.Output Ripple Voltage (mV) vs. Capacitance
and ESR
Input Capacitor
A small 1 mF input bypass capacitor (preferably with low ESR)
such as tantalum or multilayer ceramic, is recommended to
reduce noise and supply transients, and supply part of the peak
input current drawn by the ADP3607. A large capacitor is rec-
ommended if the input supply is connected to the ADP3607
through long leads, or if the pulse current drawn by the device
might affect other circuitry through supply coupling.
Output Capacitor
The output capacitor (CO) is alternately charged to the CP volt-
age when CP is switched in parallel with CO. The ESR of CO
introduces steps in the VOUT waveform whenever the charge
pump charges CO, which contributes to VOUT ripple. Thus,
ceramic or tantalum capacitors are recommended for CO to
minimize ripple on the output. Figure 17 illustrates the output
ripple voltage effect for various capacitance and ESR values.

Partno	Mfg	Dc	Qty	Available	Descript
ADP3607		N/a	6	avai	50 mA Switched Capacitor Voltage Boost with Regulated Output