ADP1606 [ADI]
2 MHz, Synchronous Boost DC-to-DC Converters;
| 型号： | ADP1606 |
| 厂家： | 
ADI |
| 描述： | 2 MHz, Synchronous Boost DC-to-DC Converters |
| 文件： | 总16页 (文件大小：520K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
2 MHz, Synchronous Boost
DC-to-DC Converters
Data Sheet
ADP1606/ADP1607
FEATURES
TYPICAL APPLICATION CIRCUITS
L
Up to 96% efficiency
2.2µH
0.8 V to VOUT input voltage range
Low 0.9 V input start-up voltage
1.8 V fixed output voltage (ADP1606)
1.8 V to 3.3 V adjustable output voltage range (ADP1607)
23 µA quiescent current
Fixed pulse-width modulation (PWM) and light load pulse
frequency modulation (PFM) mode options
Synchronous rectification
INPUT VOLTAGE
ADP1606
0.8V TO V
OUT
FIXED
OUTPUT VOLTAGE
1.8V
1
2
5
6
VIN
EN
SW
C
VOUT
MODE
IN
10µF
ON
PWM
C
OUT
3
OFF
AUTO
GND
4
10µF
True shutdown output isolation
Figure 1. ADP1606
Internal soft start, compensation, and current limit
2 mm × 2 mm, 6-lead LFCSP
L
2.2µH
Compact solution size
INPUT VOLTAGE
ADP1607
0.8V TO V
OUT
ADJUSTABLE
OUTPUT VOLTAGE
1.8V TO 3.3V
1
5
6
VIN
SW
APPLICATIONS
C
10µF
VOUT
IN
1-cell and 2-cell alkaline and NiMH/NiCd powered devices
Portable audio players, instruments, and medical devices
Solar cell applications
R1
R2
ON
C
OUT
3
FB
OFF
2
EN
GND
4
10µF
Miniature hard disk power supplies
Power LED status indicators
Figure 2. ADP1607
GENERAL DESCRIPTION
The ADP1606/ADP1607 are high efficiency, synchronous, fixed
frequency, step-up dc-to-dc switching converters with a 1.8 V
fixed output voltage option and a 1.8 V to 3.3 V adjustable
output voltage option for use in portable applications.
current limit, and current mode architecture allow excellent
transient response and a minimal external part count.
Other key features include fixed PWM and light load PFM
mode options, true output isolation, thermal shutdown (TSD),
and logic controlled enable. Available in a lead-free, thin, 6-lead
LFCSP package, the ADP1606/ADP1607 are ideal for providing
efficient power conversion in portable devices.
The 2 MHz operating frequency enables the use of small
footprint, low profile external components. Additionally, the
synchronous rectification, internal compensation, internal fixed
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADP1606/ADP1607
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Overview ..................................................................................... 10
Enable/Shutdown ....................................................................... 10
Modes of Operation................................................................... 10
Internal Control Features.......................................................... 11
Applications Information.............................................................. 12
Setting the Output Voltage........................................................ 12
Inductor Selection...................................................................... 12
Choosing the Input Capacitor .................................................. 13
Choosing the Output Capacitor............................................... 13
Layout Guidelines........................................................................... 14
Outline Dimensions....................................................................... 15
Ordering Guide .......................................................................... 15
Applications....................................................................................... 1
Typical Application Circuits............................................................ 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Thermal Operating Ranges......................................................... 4
Thermal Resistance ...................................................................... 4
ESD Caution.................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 10
REVISION HISTORY
7/14—Rev. C to Rev. D
Added ADP1606.................................................................Universal
Change to Features Section and General Description Section... 1
Added Figure 1; Renumbered Sequentially .................................. 1
Changes to Table 1............................................................................ 3
Changes to Table 2 and Thermal Resistance Section................... 4
Added Figure 3 and Table 5; Renumbered Sequentially ............. 5
Changes to Table 4............................................................................ 5
Changes to Figure 11........................................................................ 7
Added Figure 26 and Figure 27....................................................... 9
Changes to Figure 28, Overview Section, Modes of Operation
Section, and PWM Mode Section ................................................ 10
Added Table 6.................................................................................. 10
Changes to Auto Mode Section, PFM Mode Section, and Mode
Transition Section........................................................................... 11
Changes to Setting the Output Voltage Section and Inductor
Selection Section............................................................................. 12
Changes to Layout Guidelines Section ........................................ 14
Added Figure 30.............................................................................. 14
Changes to Ordering Guide .......................................................... 15
12/13—Rev. B to Rev. C
Changes to Figure 21.........................................................................9
7/13—Rev. A to Rev. B
Changes to Captions for Figure 22 and Figure 23.........................9
Changed Synchronous Rectification Section.............................. 11
12/12—Rev. 0 to Rev. A
Changes to Features Section ............................................................1
Changed TJ to TA in Specifications Section ...................................3
Changed Figure 6, Figure 7, and Figure 8 Captions .....................6
Changes to Table 5.......................................................................... 12
Changes to Choosing the Output Capacitor Section ................ 13
10/12—Revision 0: Initial Version
Rev. D | Page 2 of 16
Data Sheet
ADP1606/ADP1607
SPECIFICATIONS
VIN = VEN = 1.2 V, V OUT = 3.3 V at TA = −40°C to +85°C for minimum/maximum specifications, and TA = 25°C for typical specifications,
unless otherwise noted. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Specifications are subject to change without notice.
Table 1.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
SUPPLY
Minimum Start-Up Voltage1
Operating Input Voltage Range2
Shutdown Current
Quiescent Current
Measured on VOUT
RMIN = 22 Ω
0.9
0.8
V
V
µA
VIN
IQSD
VOUT
0.67
VEN = GND, VOUT = GND, TA = −40°C to +45°C3
Nonswitching, auto operating mode only
TA = −40°C to +45°C, ADP1607
0.06
23
23
25
25
6
29
40
35
55
11
14.6
µA
µA
µA
µA
µA
µA
ms
TA = −40°C to +85°C, ADP1607
TA = −40°C to +45°C, ADP1606, VOUT = 1.8 V
TA = −40°C to +85°C, ADP1606, VOUT = 1.8 V
TA = −40°C to +45°C
Measured on VIN
TA = −40°C to +85°C
6
1.3
Soft Start Time
SWITCH
Current Limit
ICL
ADP1607, VOUT = 3.3 V
ADP1606, VOUT = 1.8 V
ISW = 500 mA
ISW = 500 mA
VSW = 1.2 V, VOUT = 0 V, TA = −40°C to +45°C3
0.8
0.8
1
1
120
160
0.18
1.3
1.3
165
225
2
A
A
mΩ
mΩ
µA
NMOS On Resistance
PMOS On Resistance
SW Leakage Current3
OSCILLATOR
RDSON_N
RDSON_P
Switching Frequency
Maximum Duty Cycle
OUTPUT
fSW
DMAX
1.8
85
2
90
2.2
MHz
%
VOUT Range
VOUT Accuracy
FB Pin Voltage
FB Pin Current
VOUT
VOUT
VFB
ADP1607
1.8
1.764
1.2338
3.3
V
V
V
µA
ADP1606, VOUT = 1.8 V
PWM mode, ADP1607
VFB = 1.26 V, ADP1607
1.8
1.259
0.1
1.836
1.2842
0.25
IFB
EN/MODE LOGIC
Input Voltage Threshold Low
Input Voltage Threshold High
EN Leakage Current
MODE Leakage Current
THERMAL SHUTDOWN (TSD)4
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
VIL
VIH
0.25
V
V
µA
µA
0.8
VEN = GND or VIN, VOUT = 0 V
VMODE = GND or VIN, VOUT = 0 V, ADP1606
0.001
0.001
0.25
0.25
150
15
°C
°C
1 Guaranteed by design, but not production tested. VIN can never exceed VOUT once the ADP1606/ADP1607 is enabled.
2 Minimum value is characterized by design. Maximum value is characterized on the bench.
3 This parameter is the semiconductor leakage current. The semiconductor leakage current doubles with every 10°C increase in temperature. The maximum limit
follows the same trend over temperature.
4 TSD protection is only active in PWM mode.
Rev. D | Page 3 of 16
ADP1606/ADP1607
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
The junction temperature (TJ) of the device is dependent on the
ambient temperature (TA), the power dissipation of the device
(PD), and the junction-to-ambient thermal resistance of the
package (θJA). Maximum junction temperature (TJ) is calculated
from the ambient temperature (TA) and power dissipation (PD)
using the following formula:
Parameter
Rating
VIN, VOUT to GND
FB to GND
−0.3 V to +3.6 V
−0.3 V to +1.4 V
EN, SW, MODE to GND (When VIN ≥ VOUT) −0.3 V to VIN + 0.3 V
EN, SW, MODE to GND (When VIN < VOUT) −0.3 V to VOUT + 0.3 V
TJ = TA + (PD × θJA)
EPAD to GND
−0.3 V to + 0.3 V
−40°C to +85°C
90°C
THERMAL RESISTANCE
Operating Ambient Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Junction-to-ambient thermal resistance (θJA) of the package
is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages. The
junction-to-ambient thermal resistance is highly dependent
on the application and board layout. In applications where high
maximum power dissipation exists, attention to thermal board
design is required. The value of θJA may vary, depending on
PCB material, layout, and environmental conditions.
−65°C to +150°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
θ
JA and θJC (junction to case) are determined according to
JESD51-9 on a 4-layer PCB with natural convection cooling
and the exposed pad soldered to the board with thermal vias.
Absolute maximum ratings apply individually only, not in
combination.
THERMAL OPERATING RANGES
Table 3.
Package Type
θJA
θJC
Unit
The ADP1606/ADP1607 can be damaged when the junction
temperature limits are exceeded. The maximum operating
junction temperature (TJ (MAX)) takes precedence over the
maximum operating ambient temperature (TA (MAX)).
6-Lead LFCSP
66.06
4.3
°C/W
For additional information on thermal resistance, refer to the
Thermal Characteristics of IC Assembly.
Monitoring ambient temperature does not guarantee that the
ESD CAUTION
junction temperature (TJ) is within the specified temperature
limits.
In applications with high power dissipation and poor printed
circuit board (PCB) thermal resistance, the maximum ambient
temperature may need to be derated. In applications with
moderate power dissipation and low PCB thermal resistance,
the maximum ambient temperature can exceed the maximum
limit as long as the junction temperature is within specification
limits.
Rev. D | Page 4 of 16
Data Sheet
ADP1606/ADP1607
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
VIN 1
EN 2
6 VOUT
5 SW
VIN 1
EN 2
FB 3
6 VOUT
ADP1606
TOP VIEW
(Not to Scale)
ADP1607
TOP VIEW
(Not to Scale)
5 SW
7
7
EPAD
EPAD
4 GND
4 GND
MODE 3
NOTES
NOTES
1. CONNECT THE EXPOSED PAD TO GND.
1. CONNECT THE EXPOSED PAD TO GND.
Figure 3. ADP1606 Pin Configuration
Figure 4. ADP1607 Pin Configuration
Table 4. ADP1606 Pin Function Descriptions
Pin No. Mnemonic Description
1
2
3
VIN
EN
MODE
Analog and Power Supply Pin.
Shutdown Control Pin. Drive EN high to turn on the synchronous boost; drive EN low to turn it off.
Mode Select Pin. This pin toggles between auto mode (automatic transitioning between PFM and PWM mode)
and fixed PWM mode. Set MODE low to allow the device to operate in auto mode. Pull MODE high to force the
device to operate in PWM mode. The voltage applied to MODE cannot be higher than the voltage applied to VIN.
Do not leave this pin floating.
4
5
6
7
GND
SW
VOUT
EPAD
Analog and Power Ground Pin.
Drain Connection for NMOS and PMOS Power Switches.
Output Voltage and Source Connection of PMOS Power Switch.
Exposed Pad. Connect to GND.
Table 5. ADP1607 Pin Function Descriptions
Pin No. Mnemonic Description
1
2
3
4
5
6
7
VIN
EN
FB
GND
SW
Analog and Power Supply Pin.
Shutdown Control Pin. Drive EN high to turn on the synchronous boost; drive EN low to turn it off.
Output Voltage Feedback Pin.
Analog and Power Ground Pin.
Drain Connection for NMOS and PMOS Power Switches.
Output Voltage and Source Connection of PMOS Power Switch.
Exposed Pad. Connect to GND.
VOUT
EPAD
Rev. D | Page 5 of 16
ADP1606/ADP1607
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 1.2 V, VOUT = 3.3 V, L = 2.2 µH (DCRMAX = 66 mΩ, VLF302512MT-2R2M), CIN = 10 µF, COUT = 10 µF (10 V, 20%,
LMK107BJ106MALTD), VEN = VIN, and TA = 25°C, unless otherwise noted.
100
90
80
70
60
50
40
30
20
10
0
1.84
1.83
1.82
1.81
1.80
1.79
1.78
V
= 1.8V
V
= 1.8V
V
V
V
= 0.8V
= 1.2V
= 1.5V
OUT
OUT
IN
IN
IN
V
V
V
= 0.8V
= 1.2V
= 1.5V
IN
IN
IN
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 5. ADP1607 Auto Mode Efficiency vs. Load Current, VOUT = 1.8 V
Figure 8. ADP1607 Auto Mode Output Voltage Load Regulation, VOUT = 1.8 V
100
2.56
V
V
V
V
= 0.8V
= 1.2V
= 1.5V
= 2.2V
V
= 2.5V
V
= 2.5V
IN
IN
IN
IN
OUT
OUT
90
80
70
60
50
40
30
20
10
0
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
VIN = 0.8V
VIN = 1.2V
VIN = 1.5V
VIN = 2.2V
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 6. ADP1607 Auto Mode Efficiency vs. Load Current, VOUT = 2.5 V
Figure 9. ADP1607 Auto Mode Output Voltage Load Regulation, VOUT = 2.5 V
100
3.40
V
= 3.3V
V
= 3.3V
V
V
V
V
V
= 0.8V
= 1.2V
= 1.5V
= 2.2V
= 3.0V
OUT
OUT
IN
IN
IN
IN
IN
90
80
70
60
50
40
30
20
10
0
3.38
3.36
3.34
3.32
3.30
3.28
3.26
V
V
V
V
V
= 0.8V
= 1.2V
= 1.5V
= 2.2V
= 3.0V
IN
IN
IN
IN
IN
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 7. ADP1607 Auto Mode Efficiency vs. Load Current, VOUT = 3.3 V
Figure 10. ADP1607 Auto Mode Output Voltage Load Regulation,
OUT = 3.3 V
V
Rev. D | Page 6 of 16
Data Sheet
ADP1606/ADP1607
270
240
210
180
150
120
30
27
24
21
18
I
= 500mA
SW
T
T
= +90°C
A
= +25°C
= –40°C
A
T
T
T
T
= –40°C
= +25°C
= +45°C
= +85°C
A
A
A
A
T
A
15
1.8
1.8
2.3
2.8
3.3
2.3
2.8
3.3
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 14. PMOS Drain-to-Source On Resistance
Figure 11. ADP1607 Nonswitching PFM Mode Quiescent Current Measured
on VOUT vs. Input Voltage
1200
1100
1000
900
5
T
T
T
T
= –40°C
= +25°C
= +45°C
= +90°C
V
= 3.3V
A
A
A
A
OUT
V
= 2.5V
OUT
4
3
2
1
0
V
= 1.8 V
OUT
800
700
0.8
1.3
1.8
2.3
2.8
3.3
0.9
1.4
1.9
2.4
2.9
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 15. Switch Current Limit vs. Input Voltage
Figure 12. Shutdown Current vs. Input Voltage
170
155
140
125
110
95
140
120
100
80
I
= 500mA
SW
T
= +90°C
A
PWM OPERATION
60
T
T
= +25°C
= –40°C
A
40
20
PFM OPERATION
A
V
= 2.5V
OUT
0
1.8
2.3
2.8
3.3
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 16. Auto Mode Transition Thresholds
Figure 13. NMOS Drain-to-Source On Resistance
Rev. D | Page 7 of 16
ADP1606/ADP1607
Data Sheet
88.4
V
V
= 1.2V
IN
= 3.3V
OUT
I
= 1mA TO 50mA
LOAD
88.0
1
T
= +90°C
A
T
= –40°C
A
OUTPUT VOLTAGE (100mV/DIV)
87.6
87.2
86.8
86.4
AC-COUPLED
T
= +25°C
A
LOAD CURRENT
(50mA/DIV)
4
TIME (200µs/DIV)
1.8
2.3
2.8
3.3
OUTPUT VOLTAGE (V)
Figure 17. Maximum Duty Cycle vs. Output Voltage
Figure 20. PFM Mode Load Transient Response (Auto Mode Part)
2.04
2.02
2.00
1.98
1.96
1.94
V
V
= 1.2V
IN
= 3.3V
OUT
I
= 50mA TO 100mA
LOAD
1
V
= 3.3V
OUT
OUTPUT VOLTAGE (100mV/DIV)
AC-COUPLED
V
V
= 2.5V
= 1.8V
OUT
OUT
LOAD CURRENT
(50mA/DIV)
4
TIME (200µs/DIV)
–40
–10
20
TEMPERATURE (°C)
50
80
Figure 21. PWM Mode Load Transient Response (Fixed PWM Mode Part)
Figure 18. Frequency vs. Temperature
1000
900
800
700
600
500
400
300
200
100
0
V
V
R
= 1.2V
= 3.3V
IN
OUT
OUTPUT VOLTAGE
(1V/DIV)
= 3.3kΩ
LOAD
V
= 2.5V
OUT
V
= 3.3V
V
= 1.8 V
OUT
OUT
SW PIN VOLTAGE
(2V/DIV)
1
2
INDUCTOR
CURRENT
(200mA/DIV)
4
3
EN PIN VOLTAGE
(1V/DIV)
TIME (200µs/DIV)
0.8
1.3
1.8
2.3
2.8
3.3
INPUT VOLTAGE (V)
Figure 22. Startup, RLOAD = 3.3 kΩ
Figure 19. Maximum Output Current vs. Input Voltage
Rev. D | Page 8 of 16
Data Sheet
ADP1606/ADP1607
100
90
80
70
60
50
40
30
20
10
0
V
V
R
= 1.2V
IN
= 3.3V
OUT
OUTPUT VOLTAGE
(1V/DIV)
= 33Ω
LOAD
SW PIN VOLTAGE
(2V/DIV)
1
2
INDUCTOR CURRENT
(500mA/DIV)
V
V
V
= 0.8V
= 1.2V
= 1.5V
IN
IN
IN
4
3
ADP1606
= 1.8 V
EN PIN VOLTAGE
(1V/DIV)
V
OUT
TIME (200µs/DIV)
0.1
1
10
100
1000
LOAD CURRENT (mA)
Figure 26. ADP1606 Auto Mode Efficiency vs. Load Current, VOUT = 1.8 V
Figure 23. Startup, RLOAD = 33 Ω
1.850
OUTPUT VOLTAGE (100mV/DIV)
AC COUPLED
1.840
1.830
1.820
1.810
1
2
SW PIN VOLTAGE
(2V/DIV)
V
V
I
= 1.2V
= 3.3V
IN
OUT
V
V
V
= 0.8V
= 1.2V
= 1.5V
IN
IN
IN
1.800
1.790
1.780
1.770
= 10mA
LOAD
INDUCTOR CURRENT
(200mA/DIV)
ADP1606
4
V
= 1.8 V
OUT
TIME (10µs/DIV)
0.1
1
10
100
1000
LOAD CURRENT (mA)
Figure 24. Typical PFM Mode Operation, ILOAD = 10 mA
Figure 27. ADP1606 Auto Mode Output Voltage Load Regulation, VOUT = 1.8 V
OUTPUT VOLTAGE (20mV/DIV)
AC COUPLED
1
2
SW PIN VOLTAGE
(2V/DIV)
INDUCTOR CURRENT
(100mA/DIV)
V
V
= 1.2V
IN
= 3.3V
OUT
I
= 100mA
LOAD
4
TIME (400ns/DIV)
Figure 25. Typical PWM Mode Operation, ILOAD = 100 mA
Rev. D | Page 9 of 16
ADP1606/ADP1607
Data Sheet
THEORY OF OPERATION
L1
V
IN
SW
5
VIN
V
1
DD
PMOS
BULK
CONTROL
BULK
CONTROL
V
C
IN
V
IN
V
OUT
SEL
V
SEL
+
A
+
V
6
OUT
PWM
COMPARATOR
CURRENT
SENSING
ERROR
AMPLIFIER
C
OUT
P
OSCILLATOR
P DRIVER
N DRIVER
V
REF
R
COMP
QP
QN
S
C
COMP
1
CURRENT-LIMIT
COMPARATOR
ADP1607
ADJUSTABLE
V
OUT
SW
N
R
SOFT
START
V
OUT
RP
RESET
ZERO
CROSS
TSD
R1
R2
FB
COMPARATOR
3
T
SENSE
T
REF
2
ADP1606
SHUTDOWN
FIXED V
OUT
V
OUT
PFM
COMPARATOR
R1
R2
AGND
PFM
CONTROL
V
REF
MODE
3
2
4
EN
GND
PWM
AUTO
THRESHOLD
DETECT
ON
OFF
1
2
PIN 3 CONNECTION FOR ADP1607
PIN 3 CONNECTION FOR ADP1606
Figure 28. Block Diagram
ADP1606 has a MODE pin for application controlled selection
of fixed PWM mode or automatic switching from PFM to
PWM.
OVERVIEW
The ADP1606/ADP1607 are current mode, synchronous, step-up
dc-to-dc switching converters available in a 1.8 V fixed output
voltage option and a 1.8 V and 3.3 V adjustable output voltage
option. Other features include logic controlled enable, fixed
PWM and light load PFM mode options, true output isolation,
internal soft start, internal fixed current limit, internal
compensation, and TSD protection.
Table 6. ADP1606/ADP1607 Options
Output
Voltage
Operating
Modes
Model No.
ADP1606ACPZN1.8-R7
ADP1607ACPZN001-R7 Adjustable
ADP1607ACPZN-R7
1.8 V
MODE pin
Fixed PWM
Fixed auto
Adjustable
ENABLE/SHUTDOWN
PWM Mode
The EN input turns the ADP1606/ADP1607 on or off. Connect
EN to GND or logic low to shut down the device and reduce the
current consumption to 0.06 μA (typical). Connect EN to VIN
or logic high to enable the device. Do not exceed VIN. Do not
leave this pin floating.
The PWM version of the ADP1607 and the PWM mode of the
ADP1606 use a current mode PWM control scheme to force
the device to maintain a fixed 2 MHz fixed frequency while
regulating the output voltage over all load conditions. The auto
mode version of the ADP1607 and the auto mode of the
ADP1606 operate in PWM for higher load currents. In PWM,
the output voltage is monitored at the FB pin through the
external resistive voltage divider. The voltage at FB is compared
to the internal 1.259 V reference by the internal error amplifier.
MODES OF OPERATION
The ADP1606/ADP1607 are available in a fixed PWM mode
option for noise sensitive applications or in an auto PFM-to-PWM
transitioning mode option to optimize power at light loads. The
Rev. D | Page 10 of 16
Data Sheet
ADP1606/ADP1607
This current-mode PWM regulation system allows fast
transient response and tight output voltage regulation. PWM
mode operation results in lower efficiencies than PFM mode at
light loads.
The output voltage in PWM can be greater than or less than the
PFM voltage of that device.
INTERNAL CONTROL FEATURES
Input to Output Isolation
Auto Mode
While in shutdown, the ADP1606/ADP1607 manage the
voltage of the bulk of the PMOS to force it off and internally
isolate the path from the input to output. This isolation allows
the output to drop to ground, reducing the current
consumption of the application in shutdown.
Auto mode is a power saving feature that forces the auto mode
version of the ADP1607 and the auto mode of the ADP1606 to
switch between PFM and PWM in response to output load
changes. In auto mode, the ADP1606/ADP1607 operate in PFM
mode for light load currents and switch to PWM mode for
medium and heavy load currents.
Soft Start
The ADP1606/ADP1607 soft start sequence is designed for
optimal control of the device. When EN goes high, or when the
device recovers from a TSD, the start-up sequence begins. The
output voltage increases through a sequence of stages to ensure
that the internal circuitry is powered up in the correct order as
the output voltage rises to its final value.
PFM Mode
When the auto mode version of the ADP1607 and the auto
mode of the ADP1606 are operating under light load
conditions, the effective switching frequency and supply current
are decreased and varied using PFM to regulate the output
voltage. This results in improved efficiencies and lower
quiescent currents. In PFM mode, the converter only switches
when necessary to keep the output voltage between the PFM
comparator high output voltage threshold and the lower sleep
mode exit voltage threshold. Switching stops when the upper
PFM limit is reached and resumes when the lower sleep mode
exit threshold is reached.
Current Limit
The ADP1606/ADP1607 are designed with a fixed 1 A typical
current limit that does not vary with duty cycle.
Synchronous Rectification
In addition to the N-channel MOSFET switch, the
ADP1606/ADP1607 have a P-channel MOSFET switch to build
the synchronous rectifier. The synchronous rectifier improves
efficiency, especially for heavy load currents, and reduces cost
and board space by eliminating the need for an external
Schottky diode.
When VOUT exceeds the upper PFM threshold, switching stops
and the device enters sleep mode. In sleep mode, the
ADP1606/ADP1607 are mostly shut down, significantly
reducing the quiescent current. The output voltage is
discharged by the load until the output voltage reaches the
lower sleep mode exit threshold. After crossing the lower sleep
mode exit threshold, switching resumes and the process repeats.
Compensation
The PWM control loop of the ADP1606/ADP1607 is internally
compensated to deliver maximum performance with no
additional external components. The ADP1606/ADP1607 are
designed to work with 2.2 μH chip inductors and 10 μF ceramic
capacitors. Other values may reduce performance and/or
stability.
Mode Transition
The auto mode version of the ADP1607 and the auto mode of
the ADP1606 switch automatically between PFM and PWM
modes to maintain optimal efficiency. Switching to PFM allows
the converter to save power by supplying the lighter load
current with fewer switching cycles. The mode transition point
depends on the operating conditions. See Figure 16 for typical
transition levels for VOUT = 2.5 V. Hysteresis exists in the
transition point to prevent instability and decreased efficiencies
that may result if the converter oscillates between PFM and
PWM for a fixed input voltage and load current.
TSD Protection
The ADP1606/ADP1607 include TSD protection when the
device is in PWM mode only. If the die temperature exceeds
150°C (typical), the TSD protection activates and turns off the
power devices. They remain off until the die temperature falls
below 135°C (typical), at which point the converter restarts.
Rev. D | Page 11 of 16
ADP1606/ADP1607
Data Sheet
APPLICATIONS INFORMATION
2.2 µH inductors, which have favorable saturation currents and
lower series resistances for their given physical size.
SETTING THE OUTPUT VOLTAGE
The ADP1606 is available with a 1.8 V fixed output voltage. The
output voltage is set by an internal resistive feedback divider,
and no external resistors are necessary.
To ensure stable and efficient performance with the
ADP1606/ADP1607, take care to select a compatible inductor
with a sufficient current rating, saturation current, and low dc
resistance (DCR.)
The ADP1607 has an adjustable output voltage and can be
configured for output voltages between 1.8 V and 3.3 V. The
output voltage is set by a resistor voltage divider, R1, from the
output voltage (VOUT) to the 1.259 V feedback input at FB and
R2 from FB to GND (see Figure 28). Resistances between 100 kΩ
and 1 MΩ are recommended.
The maximum rated rms current of the inductor must be
greater than the maximum input current to the regulator.
Likewise, the saturation current of the chosen inductor must be
able to support the peak inductor current (the maximum input
current plus half the inductor ripple current) of the application.
For larger R1 and R2 values, the voltage drop due to the FB pin
current (IFB) on R1 becomes proportionally significant and must
be factored in.
The inductor ripple current (∆IL) in steady state continuous
mode can be calculated with Equation 2.
To account for the effect of IFB for all values of R1 and R2,
use the following equation to determine R1 and R2 for the
VIN × D
L × fSW
∆IL =
(2)
desired VOUT
:
where:
R1
R2
D is the duty cycle of the application.
L is the inductor value.
VOUT = 1+
V
FB
+ IFB (R1)
(1)
f
SW is the switching frequency of the ADP1606/ADP1607.
where:
FB = 1.259 V, typical.
FB = 0.1 µA, typical.
V
I
The duty cycle (D) can be determined with Equation 3.
VOUT − VIN
D =
(3)
INDUCTOR SELECTION
VOUT
The ADP1606/ADP1607 are designed with a 2 MHz operating
frequency, enabling the use of small chip inductors ideal for use
in applications with limited solution size constraints. The
ADP1606/ADP1607 are designed for optimal performance with
Inductors with a low DCR minimize power loss and improve
efficiency. DCR values below 100 mΩ are recommended.
Table 7. Suggested Inductors
Inductance
(µH)
DCR (mΩ)
Current
Rating (A)
Saturation
Current (A)
Manufacturer Part Number
Typ
110
110
57
70
42
Size (L × W × H) (mm) Package
TDK
MLP2016S2R2M
2.2 20%
2.2 20%
2.2 20%
2.2 20%
2.2 20%
2.2 20%
2.2 30%
2.2 20%
2.2 30%
2.2 20%
2.2 20%
2.2 20%
2.2 20%
2.2 20%
2.2 10%
1.20
1.20
1.67
1.23
2.71
1.30
1.85
1.50
2.50
1.00
1.35
1.10
1.40
1.9
2.00 × 1.60 × 1.00
2.50 × 2.00 × 1.00
2.50 × 2.00 × 1.00
3.00 × 2.50 × 1.00
3.00 × 2.50 × 1.40
2.50 × 2.00 × 0.90
3.20 × 2.50 × 1.55
2.50 × 2.00 × 1.00
4.80 × 48.0 × 2.80
2.00 × 1.25 × 1.40
2.50 × 2.00 × 1.00
3.20 × 3.00 × 1.00
3.20 × 3.00 × 1.50
3.00 × 3.00 × 1.20
4.00 × 4.00 × 2.10
0806
1008
1008
MLP2520S2R2S
1.20
1.04
1.37
1.57
VLF252012MT-2R2M
VLF302510MT-2R2M
VLF302515MT-2R2M
LQM2HPN2R2MG0
LQH32PN2R2NNC
74479787222
Murata
Wurth
80
64
1008
1210
1008
80
23
0.70
2.35
1.10
7440430022
Taiyo Yuden
Toko
BRC2012T2R2MD
MDT2520-CR2R2M
DEM2810C (1224AS-H-2R2M)
DEM2815C (1226AS-H-2R2M)
XFL3012-222
110
90
85
0805
1008
1.40
2.20
1.6
43
Coilcraft
81
21
1212
1515
XFL4020-222
8.0
3.1
Rev. D | Page 12 of 16
Data Sheet
ADP1606/ADP1607
CHOOSING THE INPUT CAPACITOR
12
10
8
The ADP1606/ADP1607 require a 10 µF or greater input bypass
capacitor (CIN) between VIN and GND to supply transient
currents while maintaining a constant input voltage. The value
of the input capacitor can be increased without any limit for
smaller input voltage ripple and improved input voltage filtering.
The capacitor must have a 4 V or higher voltage rating to support
the maximum input operating voltage. It is recommended that
6
C
IN be placed as close to the ADP1606/ADP1607 as possible.
4
Different types of capacitors can be considered, but for battery-
powered applications, the best choice is the multilayer ceramic
capacitor, due to its small size, low equivalent series resistance
(ESR), and low equivalent series inductance (ESL). X5R or X7R
dielectrics are recommended. Do not use Y5V capacitors due to
their variation in capacitance over temperature. Alternatively,
use a high value, medium ESR capacitor in parallel with a 0.1 µF
low ESR capacitor.
2
0
0
1
2
3
4
5
6
DC BIAS VOLTAGE (V)
Figure 29. Typical Ceramic Capacitor Performance
The value and characteristics of the output capacitor greatly
affect the output voltage ripple, transient performance, and
stability of the regulator. The output voltage ripple (∆VOUT) in
continuous operation is calculated as follows:
CHOOSING THE OUTPUT CAPACITOR
The ADP1606/ADP1607 require a 10 µF output capacitor
(COUT) to maintain the output voltage and supply current to the
load. The output capacitor supplies the current to the load when
the N-channel switch is on. Similar to CIN, a 4 V or greater, low
QC
COUT
I
OUT ×tON
COUT
∆VOUT
=
=
(4)
ESR, X5R or X7R ceramic capacitor is recommended for COUT
.
where:
QC is the charge removed from the capacitor.
OUT is the output load current.
ON is the on time of the N-channel switch.
When choosing the output capacitor, it is also important to account
for the loss of capacitance due to output voltage dc bias. The
loss of capacitance due to output voltage dc bias may necessitate
the use of a capacitor with a higher rated voltage to achieve the
desired capacitance value. See Figure 29 for an example of how
the capacitance of a 10 µF ceramic capacitor changes with the
dc bias voltage.
I
t
COUT is the effective output capacitance.
D
fSW
tON
=
(5)
(6)
and,
VOUT − VIN
D =
VOUT
As shown in the duty cycle and output ripple voltage equations,
the output voltage ripple increases with the load current.
Rev. D | Page 13 of 16
ADP1606/ADP1607
LAYOUT GUIDELINES
Data Sheet
For high efficiency, good regulation, and stability, a well
C
C
IN
0402
OUT
0402
designed PCB layout is required.
Use the following guidelines when designing a PCB. See
Figure 28 for a block diagram, and Figure 3 and Figure 4 for pin
configurations.
VOUT
1
6
5
VIN
EN
ADP1606
TOP VIEW
2
3
SW
•
Keep the low ESR input capacitor, CIN, close to VIN and
GND. This minimizes noise injected into the device from
board parasitic inductance.
7
EPAD
GND
4
MODE
•
•
Keep the high current path from CIN through the L
inductor to SW as short as possible.
For ADP1607, place the feedback resistors, R1 and R2, as
close to FB as possible to prevent noise pickup. Connect
the ground of the feedback network directly to an AGND
plane that makes a Kelvin connection to the GND pin. See
Figure 31 for more information.
L
2.2µH
0805
2.25mm
Figure 30. ADP1606 Recommended Layout Showing the Smallest Footprint
•
•
•
Avoid routing high impedance traces from feedback
resistors near any node connected to SW or near the
inductor to prevent radiated noise injection.
Keep the low ESR output capacitor, COUT, close to VOUT
and GND. This minimizes noise injected into the device
from board parasitic inductance.
C
C
IN
0402
OUT
0402
VOUT
1
6
5
VIN
EN
ADP1607
Connect Pin 7 (EPAD) and GND to a large copper plane
for proper heat dissipation.
TOP VIEW
2
3
SW
7
EPAD
GND
4
FB
R1
0402
R2
0402
L
2.2µH
0805
3.0mm
Figure 31. ADP1607 Recommended Layout Showing the Smallest Footprint
Rev. D | Page 14 of 16
Data Sheet
ADP1606/ADP1607
OUTLINE DIMENSIONS
1.70
1.60
1.50
2.10
2.00 SQ
1.90
0.65 BSC
6
4
0.15 REF
PIN 1 INDEX
EXPOSED
PAD
1.10
1.00
0.90
AREA
0.425
0.350
0.275
0.20 MIN
3
1
PIN 1
TOP VIEW
BOTTOM VIEW
INDICATOR
(R 0.15)
0.60
0.55
0.50
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
0.05 MAX
0.02 NOM
SECTION OF THIS DATA SHEET.
SEATING
PLANE
0.35
0.30
0.25
0.20 REF
Figure 32. 6-Lead Lead Frame Chip Scale Package [LFCSP_UD]
2.00 mm × 2.00 mm Body, Ultra Thin, Dual Lead
(CP-6-3)
Dimensions Shown in Millimeters
ORDERING GUIDE
Output
Voltage
Operating Temperature
Package
Option
Model1
Modes
MODE Pin
MODE Pin
Auto
Range
Package Description
Branding
ADP1606ACPZN1.8-R7
ADP1606-1.8-EVALZ
ADP1607ACPZN-R7
ADP1607ACPZN001-R7 Adjustable
ADP1607-EVALZ
1.8 V
1.8 V
–40°C to +85°C 6-Lead LFCSP_UD
–40°C to +85°C Evaluation Board, VOUT = 1.8 V
–40°C to +85°C 6-Lead LFCSP_UD
–40°C to +85°C 6-Lead LFCSP_UD
CP-6-3
LM8
Adjustable
CP-6-3
CP-6-3
LJ5
LJ1
PWM
Auto
Evaluation Board, Automatic PFM/PWM
Switching Modes
ADP1607-001-EVALZ
1 Z = RoHS Compliant Part.
PWM
Evaluation Board, PWM Mode Only
Rev. D | Page 15 of 16
ADP1606/ADP1607
NOTES
Data Sheet
©2012–2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10276-0-7/14(D)
Rev. D | Page 16 of 16
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明