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ADP1828 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 ADP1828
기능 Step-Down DC-to-DC Controller
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ADP1828 데이터시트, 핀배열, 회로
Synchronouwwsw.DBatuaScheket4UP.cWom M,
Step-Down, DC-to-DC Controller
ADP1828
FEATURES
Wide bias voltage range 3.0 V to 18 V
Wide power stage input range 1 V to 24 V
Wide output voltage range: 0.6 V to 85% of input voltage
±0.85% accuracy at 0oC to 70oC
All N-channel MOSFET design for low cost
Fixed-frequency operation at 300 kHz, 600 kHz, or resistor
adjustable 300 kHz to 600 kHz
Clock output for synchronizing other controllers
No current sense resistor required
Internal linear regulator
Voltage tracking for sequencing
Soft start and thermal overload protection
Overvoltage and undervoltage power-good indicator
15 μA shutdown supply current
Available in a 20-lead QSOP
APPLICATIONS
Telecom and networking systems
Base station power
Set-top boxes, game consoles
Printers and copiers
Medical imaging systems
DSP and microprocessor core power supplies
DDR termination
GENERAL DESCRIPTION
The ADP1828 is a versatile and synchronous PWM voltage
mode buck controller. It drives an all N-channel power stage
R6
100k
C2
33pF
C5
1µF
C7
1µF
C6
1µF
R8
20k
C3
5.6nF
VREG PV
TRK BST
IN ADP1828 DH
EN
FREQ
SW
CSL
DL
SYNC
PGOOD
COMP
PGND
FB
CLKOUT
SS CLKSET
CSS
200nF
GND
AGND
to regulate an output voltage as low as 0.6 V to 85% of the input
voltage and is sized to handle large MOSFETs for point-of-load
regulators. The ADP1828 is ideal for a wide range of high power
applications, such as DSP and processor core I/O power, and
general-purpose power in telecommunications, medical imaging,
PC, gaming, and industrial applications. It operates from input
bias voltages of 3 V to 18 V with an internal LDO that generates
a 5 V output for input bias voltages greater than 5.5 V.
The ADP1828 operates at a pin-selectable, fixed switching
frequency of either 300 kHz or 600 kHz, or at any frequency
between 300 kHz and 600 kHz with a resistor. The switching
frequency can also be synchronized to an external clock up to
2× the part’s nominal oscillator frequency. The clock output
can be used for synchronizing additional ADP1828s (or the
ADP1829 controllers), thus eliminating the need for an external
clock source. The ADP1828 includes soft start protection to
limit any inrush current from the input supply during startup,
reverse current protection during soft start for a precharged
output, as well as a unique adjustable lossless current-limit
scheme utilizing external MOSFET RDSON sensing.
For applications requiring power-supply sequencing, the
ADP1828 provides a tracking input that allows the output
voltage to track during startup, shutdown, and faults. The
additional supervisory and control features include thermal
overload, undervoltage lockout, and power good.
The ADP1828 operates over the −40°C to +125°C junction
temperature range and is available in a 20-lead QSOP.
D1
C4
0.47µF
RCL
1.8k
VIN = 10V TO 18V
CIN
180µF
×2
20V
M1
L1 = 0.82µH
COUT2
M2 1000µF
×2 ×2
AGND PGND
OUTPUT
1.8V, 20A
COUT1
47µF
R3
7.5k
X5R
6.3V
R1
20k
C1
680pF
R2
10k
CfCSIOWNU: =TS2A:30SN0AYkNOHY,zOO,SPCOOSNC2A0PSP2R1850TMPD1000M5
L1: WURTH ELEKTRONIC, 0.82µH, 744355182
D1: BAT54
M1: INFINEON, BSC080N03LS
M2: INFINEON, 2 × BSC030N03LS
Figure 1. Typical Application Circuit with 20 A Output
Rev. 0
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.




ADP1828 pdf, 반도체, 판매, 대치품
ADP1828
Parameter
OSCILLATOR
Oscillator Frequency
SYNC Synchronization Range
SYNC Input Pulse Width
SYNC Pin Capacitance
CURRENT SENSE
CSL Threshold Voltage
CSL Output Current
Current Sense Blanking Period
GATE DRIVERS
DH Rise Time
DH Fall Time
DL Rise Time
DL Fall Time
DH or DL Driver RON, Sourcing Current3, 4
DH or DL Driver RON, Sinking Current3, 4
DH or DL Driver RON, Sourcing Current
DH or DL Driver RON, Sinking Current
DH to DL, DL to DH Dead Time
CLOCK OUT
CLOCKOUT Pulse Width
CLKOUT Rise or Fall Time
SYNC to CLKOUT Propagation Delay, tPD
SYNC to CLKOUT Propagation Delay, tPD
LOGIC THRESHOLDS
SYNC, CLKSET, FREQ Logic High
SYNC, CLKSET Logic Low
FREQ Logic Low
CLKSET, SYNC, FREQ Input Leakage
Current
EN Input Threshold
EN Input Threshold Hysteresis
EN Current Source
EN Input Impedance to 5 V Zener
THERMAL SHUTDOWN
Thermal Shutdown Threshold4
Thermal Shutdown Hysteresis4
Conditions
SYNC = FREQ = GND
SYNC = GND, FREQ = VREG
RFREQ = 57.6 kΩ
RFREQ = 35.7 kΩ
RFREQ = 24.9 kΩ
FREQ = GND
FREQ = VREG
Relative to PGND
CSL = PGND
CDH = 3 nF, VBST − VSW = 5 V
CDH = 3 nF, VBST − VSW = 5 V
CDL = 3 nF
CDL = 3 nF
Sourcing 1.5 A with a 0.1 μs pulse
Sinking 1.5 A with a 0.1 μs pulse
IN = VREG = 3 V; sourcing 1 A with a 0.1 μs pulse
IN = VREG = 3 V; sinking 1 A with a 0.1 μs pulse
CCLKOUT = 47 pF
CCLKOUT = 47 pF, CSYNC = 5 pF
CCLKOUT = 47 pF, CSYNC = 5 pF, IN < 5 V
CLKSET, SYNC, FREQ = 0 V or VREG
EN = 0 V to 3.0 V
EN = 5.5 V to 18 V
www.Dat
Min Typ Max Unit
240 300
480 600
240 300
370 450
480 600
300
600
200
5
360
720
360
530
720
600
1200
kHz
kHz
kHz
kHz
kHz
kHz
kHz
ns
pF
−17 −38
42 50
100
−58 mV
56 μA
ns
15 ns
10 ns
15 ns
10 ns
1.5 Ω
2.3 Ω
40 ns
360 ns
10 ns
40 ns
52 ns
1.8 V
0.4 V
0.25 V
1 μA
1.1 1.5
0.2
−0.1 −0.6
100
1.8 V
V
−1.5 μA
145 °C
15 °C
Rev. 0 | Page 4 of 32

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ADP1828 전자부품, 판매, 대치품
SIMPLIFIED BLOCK DIAGRAM
VREG
0.6V
0.8V
ADP1828
REF
0.75V
0.55V
IN
IN
LINEAR
REG
UVLO
THERMAL
SHUTDOWN
EN
CLKOUT
CLKSET
100k
CLKOUT
DRIVER
LOGIC
FAULT
FREQ
SYNC
COMP
FB
TRK
SS
OSCILLATOR
CLK
RAMP
PWM
COMPARATOR
VREG
50µA
0.6V
0.75V
ERROR
AMPLIFIER
90k
6k
0.8V
FAULT
0.55V
SQ
PWM
RQ
ILIM
GND
Figure 2. Simplified Block Diagram
ADP1828www.DataSheet4U.com
BST
DH
SW
PV
DL
PGND
CSL
PGOOD
Rev. 0 | Page 7 of 32

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