19-4372; Rev 2; 7/09
KIT
ATION
EVALU
BLE
AVAILA
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
General Description
Features
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Single-/Dual-Phase, Quick-PWM Controllers
MAX17021 IMVP-6+ (Montevina)
MAX17082/MAX17482 IMVP-6.5 (Calpella)
±0.5% V
OUT
Accuracy Over Line, Load, and
Temperature
7-Bit 0 to 1.50V VID Control
Dynamic Phase Selection Optimizes Active/Sleep
Efficiency
Transient Phase Overlap Reduces Output
Capacitance
Integrated Boost Switches
Active Voltage Positioning with Adjustable Gain
Programmable 200kHz to 800kHz Switching
Frequency
Accurate Current Balance and Current Limit
Adjustable Slew-Rate Control
Power-Good, Clock Enable, and Thermal-Fault
Outputs
Phase Current Imbalance Fault Output
Drives Large Synchronous Rectifier MOSFETs
4V to 26V Battery Input-Voltage Range
Undervoltage and Thermal-Fault Protection
Overvoltage Protection (MAX17021/MAX17082)
Soft-Startup and Soft-Shutdown
MAX17021/MAX17082/MAX17482
The MAX17021/MAX17082/MAX17482 are 2/1-phase-
interleaved Quick-PWM™ step-down VID power-supply
controllers for notebook CPUs. True out-of-phase oper-
ation reduces input ripple current requirements and
output- voltage ripple, while easing component selec-
tion and layout difficulties. The Quick-PWM control pro-
vides instantaneous response to fast load-current
steps. Active voltage positioning reduces power dissi-
pation and bulk output capacitance requirements and
allows ideal positioning compensation for tantalum,
polymer, or ceramic bulk output capacitors.
A slew-rate controller allows controlled transitions between
VID codes, controlled soft-start and shutdown, and con-
trolled exit from suspend. A thermistor-based temperature
sensor provides a programmable thermal-fault output
(VRHOT). A current monitor output (IMON) provides an
analog current output proportional to the power consumed
by the CPU (MAX17082/MAX17482 only). Output under-
voltage, overvoltage (MAX17021/MAX17082 only), and
thermal protection shut the controller down when any of
these faults are detected. A voltage-regulator power-OK
(PWRGD) output indicates the output is in regulation.
Additionally, the MAX17021/MAX17082/MAX17482 fea-
ture true differential current sense and a phase-good
(PHASEGD) output that indicates a phase imbalance
fault condition.
The MAX17021 supports the IMVP-6+ specification
while the MAX17082/MAX17482 support the IMVP-6.5
requirements. The MAX17021/MAX17082/MAX17482
are available in a 5mm x 5mm, 40-pin TQFN package.
Pin Configuration
BST1
BST2
20 PHASEGD
19 PWRGD
18 CLKEN
17 V3P3
16 TON
15 PSI
14 DPRSLPVR
*EP
13 SHDN
12 CSP2
11 CSN2
1
PGDIN
2
THRM
3
N.C. (IMON)
4
ILIM
5
TIME
6
V
CC
7
CCI
8
FB
9
FBAC
10
GNDS
DH1
DH2
DL1
DL2
V
DD
LX1
LX2
TOP VIEW
IMVP-6+/IMVP-6.5 Core Supply
Multiphase CPU Core Supply
Voltage-Positioned, Step-Down Converters
Notebook/Desktop Computers
Blade Servers
DPRSTP (SLOW) 31
D0 32
D1 33
D2 34
D3 35
D4 36
30 29 28 27 26 25 24 23 22 21
Ordering Information
PART
MAX17021GTL+
MAX17082GTL+
TEMP RANGE
-40°C to +105°C
-40°C to +105°C
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
D5 37
D6 38
CSP1 39
CSN1 40
MAX17021
(MAX17082)
MAX17482
+
MAX17482GTL+
-40°C to +105°C
40 TQFN-EP*
+Denotes
a lead-free(Pb)/RoHS-compliant package.
*EP
= Exposed pad.
THIN QFN
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
() DESIGNATES MAX17082/MAX17482 PIN NAME.
*EXPOSED PAD. CONNECTED TO GND.
________________________________________________________________
Maxim Integrated Products
VRHOT
Applications
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
MAX17021/MAX17082/MAX17482
ABSOLUTE MAXIMUM RATINGS
V
CC
, V
DD,
V3P3 to GND ...........................................-0.3V to +6V
D0–D6 to GND..........................................................-0.3V to +6V
PGDIN, DPRSLPVR,
PSI
to GND..............................-0.3V to +6V
DPRSTP
(MAX17021) to GND ..................................-0.3V to +6V
SLOW
(MAX17082/MAX17482) to GND...................-0.3V to +6V
CSP1, CSP2, CSN1, CSN2 to GND..........................-0.3V to +6V
THRM, ILIM, PHASEGD to GND...............................-0.3V to +6V
PWRGD,
VRHOT
to GND .........................................-0.3V to +6V
CLKEN
to GND ...........................................-0.3V to V3P3 + 0.3V
FB, FBAC to GND .........................................-0.3V to V
CC
+ 0.3V
TIME, CCI to GND.........................................-0.3V to V
CC
+ 0.3V
IMON to GND (MAX17021/MAX17082) ........-0.3V to V
CC
+ 0.3V
GNDS to GND .......................................................-0.3V to +0.3V
SHDN
to GND (Note 1)...........................................-0.3V to +16V
TON to GND ...........................................................-0.3V to +30V
DL1, DL2 to GND..........................................-0.3V to V
DD
+ 0.3V
BST1, BST2 to GND ...............................................-0.3V to +36V
BST1, BST2 to V
DD
.................................................-0.3V to +30V
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
DH1 to LX1 ..............................................(-0.3V to V
BST1
) + 0.3V
DH2 to LX2 ..............................................(-0.3V to V
BST2
) + 0.3V
Continuous Power Dissipation
40-Pin 5mm x 5mm TQFN Up to +70°C.....................1778mW
(derate above +70°C) ............................................22.2mW/°C
Operating Temperature Range .........................-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
SHDN
might be forced to 12V for the purpose of debugging prototype boards using the no-fault test mode, which disables
fault protection and overlapping operation.
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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= 10V, V
CC
= V
DD
= V
SHDN
= V
PGDIN
= V
PSI
= V
ILIM
= 5V, V3P3 = 3.3V, DPRSLPVR = GNDS = GND, V
CSP1
= V
CSN1
= V
CSP2
= V
CSN1
= 1.0000V, FB = FBAC, R
FBAC
= 3.57kΩ from FBAC to CSN1, D6–D0 = [0101000]; MAX17082/MAX17482:
V
SLOW
= 5V; MAX17021:
DPRSTP
= GND;
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
PWM CONTROLLER
Input-Voltage Range
V
CC
, V
DD
V3P3
Measured at FB
with respect to
GNDS;
includes load-
regulation error
(Note 2)
MAX17021 IMVP-6+
MAX17082/MAX17482 IMVP-6.5
V
CC
= 4.5V to 5.5V, V
IN
= 4.5V to 26V
T
A
= +25°C
A
GNDS
I
GNDS
V
TIME
V
OUT
/ V
GNDS
T
A
= +25°C
R
TIME
= 71.5k
-0.1
-200
0.97
-0.5
1.985
2.000
1.00
DAC codes from 0.8125V
to 1.5000V
DAC codes from 0.3750V
to 0.8000V
DAC codes from 0 to
0.3625V
4.5
3.0
-0.5
-7
-20
1.194
1.094
1.200
1.100
0.1
+0.1
+200
1.03
+0.5
2.015
5.5
3.6
+0.5
+7
mV
+20
1.206
1.106
V
%
μA
mV
V/V
μA
V
V
%
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC Output-Voltage
Accuracy
V
OUT
Boot Voltage
Line Regulation Error
FB Input Bias Current
GNDS Input Range
GNDS Gain
GNDS Input Bias Current
TIME Regulation Voltage
V
BOOT
2
_______________________________________________________________________________________
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 10V, V
CC
= V
DD
= V
SHDN
= V
PGDIN
= V
PSI
= V
ILIM
= 5V, V3P3 = 3.3V, DPRSLPVR = GNDS = GND, V
CSP1
= V
CSN1
= V
CSP2
= V
CSN1
= 1.0000V, FB = FBAC, R
FBAC
= 3.57kΩ from FBAC to CSN1, D6–D0 = [0101000]; MAX17082/MAX17482:
V
SLOW
= 5V; MAX17021:
DPRSTP
= GND;
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
R
TIME
= 71.5k
CONDITIONS
(12.5mV/μs nominal)
R
TIME
= 35.7k (25mV/μs nominal) to 178k
(5mV/μs nominal)
Soft-start and soft-shutdown:
R
TIME
= 35.7k (3.125mV/μs nominal) to 178k
(0.625mV/μs nominal)
Slow:
IMVP-6.5 (MAX17082/MAX17482): V
SLOW
= 0V,
1/2 of nominal slew rate, R
TIME
= 71.5k
(6.25mV/μs nominal);
IMVP-6+ (MAX17021): V
DPRSTP
= V
DPRSLPVR
= 5V,
1/4 of nominal slew rate, R
TIME
= 71.5k
(3.125mV/μs nominal)
Slow:
IMVP-6.5 (MAX17082/MAX17482): V
SLOW
= 0V,
1/2 of nominal slew rate, R
TIME
= 35.7k
(12.5mV/μs nominal) to 178k (2.5mV/μs
nominal);
IMVP-6+ (MAX17021): V
DPRSTP
= V
DPRSLPVR
= 5V
1/4 of nominal slew rate, R
TIME
= 35.7k
(6.25mV/μs nominal) to 178k (1.25mV/μs
nominal)
R
TON
= 96.75k (600kHz per phase),
167ns nominal
On-Time
t
ON
Measured
at DH_
(Note 3)
R
TON
= 200k (300kHz per phase),
333ns nominal
R
TON
= 303.25k
500ns nominal
Minimum Off-Time
TON Shutdown Input
Current
BIAS CURRENTS
Quiescent Supply Current
(V
CC
)
Quiescent Supply Current
(V
DD
)
I
CC
I
DD
Measured at V
CC
, V
DPRSLPVR
= 5V, FB forced
above the regulation point
Measured at V
DD
, V
DPRSLPVR
= 0V, FB forced
above the regulation point, T
A
= +25°C
2.5
0.02
5
1
mA
μA
t
OFF(MIN)
I
RTON,SDN
Measured at DH_ (Note 3)
SHDN
= GND, V
IN
= 26V, V
CC
= V
DD
= 0V or 5V,
T
A
= +25°C
(200kHz per phase),
MIN
-10
-15
TYP
MAX
+10
+15
UNITS
MAX17021/MAX17082/MAX17482
-25
+25
-15
+15
%
TIME Slew-Rate Accuracy
-15
+15
-15
-10
-15
300
0.01
+15
+10
+15
350
0.1
ns
μA
%
_______________________________________________________________________________________
3
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
MAX17021/MAX17082/MAX17482
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 10V, V
CC
= V
DD
= V
SHDN
= V
PGDIN
= V
PSI
= V
ILIM
= 5V, V3P3 = 3.3V, DPRSLPVR = GNDS = GND, V
CSP1
= V
CSN1
= V
CSP2
= V
CSN1
= 1.0000V, FB = FBAC, R
FBAC
= 3.57kΩ from FBAC to CSN1, D6–D0 = [0101000]; MAX17082/MAX17482:
V
SLOW
= 5V; MAX17021:
DPRSTP
= GND;
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Quiescent Supply Current
(V3P3)
Shutdown Supply Current
(V
CC
)
Shutdown Supply Current
(V
DD
)
Shutdown Supply Current
(V3P3)
FAULT PROTECTION
Skip mode after output reaches the regulation
voltage or PWM mode; measured at FB with
respect to the voltage target set by the VID code;
see Table 4.
V
OVP
Soft-start, soft-shutdown, skip
mode, and output have not
reached the regulation
voltage; measured at FB
IMVP-6.5
(MAX17082)
IMVP-6+
(MAX17021)
SYMBOL
I
3P3
I
CC,SDN
I
DD,SDN
I
3P3,SDN
CONDITIONS
Measured at V3P3, FB forced within the
CLKEN
power-good window
Measured at V
CC
,
SHDN
= GND, T
A
= +25°C
Measured at V
DD
,
SHDN
= GND, T
A
= +25°C
Measured at V3P3,
SHDN
= GND, T
A
= +25°C
MIN
TYP
2
0.01
0.01
0.01
MAX
4
1
1
1
UNITS
μA
μA
μA
μA
250
300
350
mV
Output Overvoltage-
Protection Threshold
(MAX17021/MAX17082 Only)
1.45
1.75
1.50
1.80
0.8
10
1.55
1.85
V
Minimum OVP threshold; measured at FB
Output Overvoltage-
Propagation Delay
(MAX17021/MAX17082 Only)
Output Undervoltage-
Protection Threshold
Output Undervoltage-
Propagation Delay
CLKEN
Startup Delay and
Boot Time Period
PWRGD Startup Delay
t
OVP
FB forced 25mV above trip threshold
Measured at FB with respect to the voltage target
set by the VID code; see Table 4
FB forced 25mV below trip threshold
Measured from the time when FB reaches the
boot target voltage (Note 2)
Measured at startup from the time when
CLKEN
goes low
Lower threshold,
falling edge
(undervoltage)
Upper threshold,
rising edge
(overvoltage)
20
3
μs
V
UVP
t
UVP
t
BOOT
-450
-400
10
60
6.5
-350
mV
μs
100
10
μs
ms
CLKEN
and PWRGD
Threshold
Measured at FB with respect
to the voltage target set by
the VID code; see Table 4,
20mV hysteresis (typ)
-350
-300
-250
mV
+150
+200
+250
CLKEN
and PWRGD Delay
PHASEGD Delay
FB forced 25mV outside the PWRGD trip
thresholds
V
(CCI,FB)
forced 25mV outside trip thresholds
10
10
μs
μs
4
_______________________________________________________________________________________
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 10V, V
CC
= V
DD
= V
SHDN
= V
PGDIN
= V
PSI
= V
ILIM
= 5V, V3P3 = 3.3V, DPRSLPVR = GNDS = GND, V
CSP1
= V
CSN1
= V
CSP2
= V
CSN1
= 1.0000V, FB = FBAC, R
FBAC
= 3.57kΩ from FBAC to CSN1, D6–D0 = [0101000]; MAX17082/MAX17482:
V
SLOW
= 5V; MAX17021:
DPRSTP
= GND;
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
CLKEN,
PWRGD, and
PHASEGD Transition
Blanking Time
(VID Transitions)
PHASEGD Transition
Blanking Time (Phase 2
Enable Transitions)
CLKEN
Output Low Voltage
CLKEN
Output High
Voltage
PWRGD, PHASEGD Output
Low Voltage
PWRGD, PHASEGD
Leakage Current
CSN1 Pulldown Resistance
in Shutdown
V
CC
Undervoltage Lockout
(UVLO) Threshold
THERMAL PROTECTION
VRHOT
Trip Threshold
VRHOT
Delay
VRHOT
Output
On-Resistance
VRHOT
Leakage Current
THRM Input Leakage
Thermal-Shutdown Threshold
I
THRM
T
SHDN
t
VRHOT
Measured at THRM as a percentage of V
CC
,
falling edge, typical hysteresis = 75mV
THRM forced 25mV below the
VRHOT
trip
threshold, falling edge
29
30
10
2
10
1
-0.1
160
7
45
20
-4
10
50
22.5
13
55
25
+4
mV
mV
+0.1
μA
μA
°C
31
%
μs
V
UVLO(VCC)
SYMBOL
CONDITIONS
Measured from the time when FB reaches the
target voltage (Note 2)
MIN
TYP
MAX
UNITS
MAX17021/MAX17082/MAX17482
t
BLANK
20
μs
Number of DH2 pulses for which PHASEGD is
blanked after phase 2 is enabled
Low state, I
SINK
= 3mA
High state, I
SOURCE
= 3mA
Low state, I
SINK
= 3mA
High-impedance state, PWRGD, PHASEGD forced
to 5V, T
A
= +25°C
SHDN
= 0, measured after soft-shutdown
completed (DL_ = low)
Rising edge, 65mV typical hysteresis,
controller disabled below this level
4.05
V3P3 -
0.4
32
0.4
Pulses
V
V
0.4
1
V
μA
10
4.27
4.48
V
R
ON(VRHOT)
Low state
High-impedance state,
VRHOT
forced to 5V,
T
A
= +25°C
V
THRM
= 0 to 5V, T
A
= +25°C
Typical hysteresis = 15°C
V
TIME
- V
ILIM
= 100mV
V
LIMIT
V
CSP_
- V
CSN_
V
TIME
- V
ILIM
= 500mV
ILIM = V
CC
VALLEY CURRENT LIMIT, DROOP, AND CURRENT BALANCE
Current-Limit Threshold
Voltage (Positive)
Current-Limit Threshold
Voltage (Negative)
Accuracy
Current-Limit Threshold
Voltage (Zero Crossing)
V
LIMIT(NEG)
V
CSP_
- V
CSN_
, nominally -125% of V
LIMIT
V
ZERO
V
GND
- V
LX_
, DPRSLPVR = 5V
1
mV
_______________________________________________________________________________________
5
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