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What is ADP3208?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "Synchronous Buck Controller".


ADP3208 Datasheet PDF - ON Semiconductor

Part Number ADP3208
Description Synchronous Buck Controller
Manufacturers ON Semiconductor　
Logo ON Semiconductor Logo　


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7-Bit, Programmable, Dual-Phase, Mobile,
CPU, Synchronous Buck Controller
ADP3208
FEATURES
Single-chip solution
Fully compatible with the Intel® IMVP-6+™ specifications
Integrated MOSFET drivers
Selectable 1- or 2-phase operation with up to 1 MHz per
phase switching frequency
Guaranteed ±8 mV worst-case differentially sensed core
voltage error over temperature
Automatic power-saving mode maximizes efficiency with
light load during deeper sleep operation
Soft transient control reduces inrush current and audio noise
Active current balancing between output phases
Independent current limit and load line setting inputs for
additional design flexibility
Built-in power-good blanking supports
voltage identification (VID) on-the-fly transients
7-bit, digitally programmable DAC with 0.3 V to 1.5 V output
Short-circuit protection with programmable latch-off delay
Clock enable output delays the CPU clock until the core
voltage is stable
Output power or current monitor options
48-lead LFCSP
APPLICATIONS
Notebook power supplies for next-generation Intel processors
GENERAL DESCRIPTION
The ADP3208 is a highly efficient, multiphase, synchronous
buck switching regulator controller. With its integrated drivers,
the ADP3208 is optimized for converting the notebook battery
voltage into the core supply voltage required by high performance
Intel processors. An internal 7-bit DAC is used to read a VID code
directly from the processor and to set the CPU core voltage to a
value within the range of 0.3 V to 1.5 V. The phase relationship
of the output signals ensures interleaved 2-phase operation.
The ADP3208 uses a multimode architecture run at a program-
mable switching frequency and optimized for efficiency depending
on the output current requirement. The ADP3208 switches
between single- and dual-phase operation to maximize efficiency
with all load conditions. The chip includes a programmable load
line slope function to adjust the output voltage as a function of the
load current so that the core voltage is always optimally positioned
for a load transient. The ADP3208 also provides accurate and
reliable short-circuit protection, adjustable current limiting, and
a delayed power-good output. The IC supports on-the-fly output
voltage changes requested by the CPU.
The ADP3208 is specified over the extended commercial tempera-
ture range of 0°C to 100°C and is available in a 48-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
RAMP VRPM RPM RT
SP
PSI
VID6, VID5,
VID4, VID3,
VID2, VID1,
VID0
ST
VARFREQ
DPRSTP
DPRSLP
SS
PWRGD
PGDELAY
CLKEN
EN
VCC
GND
RAMP
GENER-
ATOR
OSCILLATOR
PWM
CMPS
PWM
LATCH
PHASE
CONTROL
DRV2
IN
OD2
VREF
SWITCH
AMPS
VID
DAC
VDAC
REFER-
ENCE
SELECT
FBRTN
CLREF
PSI
HOUSE-
KEEPING
CLTHSEL
OVTH
UVTH
REFTH BIAS
DRV1
IN
OD1B
OD1A
+
–
–
+
ERR AMP ++––
CSAMP
CLIM
CMP –
+
–
+
SS
+–
+–
UVLO
REF BIAS
ADP3208
VREF PMON
PWM
CSAVG –
+
PMON PMONFS
VCC
BST2
DRVH2
SW2
PVCC2
DRVL2
PGND2
BST1
DRVH1
SW1
PVCC1
DRVL1
PGND1
COMP
FB
LLINE
CSCOMP
CSSUM
CSREF
CLIM
VRTT
TTSNS
FBRTN
©2007 SCILLC. All rights reserved.
December 2007 – Rev. 1
Figure 1.
Publication Order Number:
ADP3208/D

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ADP3208 equivalent
ADP3208
Parameter
THERMAL THROTTLING/CROWBAR
DISABLE CONTROL
TTSNS Voltage Range2
TTSNS VRTT Threshold Voltage
TTSNS VRTT Threshold Hysteresis
TTSNS Crowbar Disable Threshold
Voltage
TTSNS Input Current
VRTT Output Low Voltage
VRTT Output High Voltage
POWER GOOD
CSREF Undervoltage Threshold
CSREF Overvoltage Threshold
CSREF Crowbar (Overvoltage
Protection) Threshold
CSREF Reverse Voltage Detection
Threshold
PWRGD Output Low Voltage
PWRGD Output Leakage Current
Power-Good Delay Timer
PGDELAY Voltage Detection
Threshold
PGDELAY Charge Current
PGDELAY Discharge Resistance
PWRGD Masking Time
CLOCK ENABLE
Output Low Voltage
Output Leakage Current
POWER MONITOR
PMON Output Resistance
PMON Leakage Current
PMON Oscillator Frequency
PMONFS Voltage Range2
PMONFS Output Current
HIGH-SIDE MOSFET DRIVERS
DRVH Output Resistance, Sourcing
Current
DRVH Output Resistance, Sinking
Current
Transition Times
Propagation Delay Time
Symbol
Conditions
transition
DPRSTP = high, PSI = high
PSI = low
VVRTT(TTSNS)
Temperature sensing
Crowbar disable threshold disable
VCC = 5 V, TTSNS falling
VCBDIS(TTSNS)
VOL(VRTT)
VOH(VRTT)
TTSNS > 1.0 V, temperature sensing
TTSNS = 0 V, disabling overvoltage
protection
ISINK(VRTT) = 400 μA
ISOURCE(VRTT) = −400 μA
VUV(CSREF)
VOV(CSREF)
VCB(CSREF)
VRVP(CSREF)
VOL(PWRGD)
Relative to VVID = 0.5 V to 1.5 V
Relative to VVID = 0.3125 V to 0.4875 V
Relative to VVID = 0.5 V to 1.5 V
Relative to FBRTN
Relative to FBRTN
CSREF falling
CSREF rising
ISINK(PWRGD) = 4 mA
VPWRDG = 5 V
VTH(PGDELAY)
IPGDELAY
RPGDELAY
VPGDELAY = 2.0 V
VPGDELAY = 0.2 V
ISINK = 4 mA
CLKEN = 5 V, VSS = GND
ISINK = 2 mA
PMON = 5 V
PMONFS = 2 V
PMONFS = 2.5 V
BST − SW = 4.6 V
BST − SW = 4.6 V
trDRVH,
tfDRVH
tpdhDRVH
BST − SW = 4.6 V, CL = 3 nF, see Figure 2
BST − SW = 4.6 V, CL = 3 nF, see Figure 2
BST − SW = 4.6 V, see Figure 2
Rev. 1 | Page 5 of 38 | www.onsemi.com
Min
0.4
0
2.45
50
−1
4
−160
150
1.65
−400
1.5
Typ
1
−100
2.5
95
−3
50
5
−300
200
1.7
−300
−60
70
0.03
2.9
−3
600
130
100
16
320
−10
1.9
1.5
10
8
16
Max
5
50
2.55
50
+1
100
250
1.75
−5
200
3
400
1
1
4
3.3
3
30
25
70
Unit
μA
nA
V
mV
V
mV
mV
μA
μA
mV
V
mV
mV
mV
V
mV
mV
mV
μA
V
μA
Ω
μs
mV
μA
Ω
μA
kHz
V
μA
Ω
Ω
ns
ns
ns


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADP3208 electronic component.


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