19-3279; Rev 5; 3/11
KIT
ATION
EVALU
BLE
AVAILA
Low-Voltage DDR Linear Regulators
General Description
Features
o
Internal Power MOSFETs with Current Limit (3A typ)
o
Fast Load-Transient Response
o
External Reference Input with Reference
Output Buffer
o
1.1V to 3.6V Power Input
o
±15mV
(max) Load-Regulation Error
o
Thermal-Fault Protection
o
Shutdown Input
o
Power-Good Window Comparator with 2ms
(typ) Delay
o
Small, Low-Profile 10-Pin, 3mm x 3mm TDFN
Package
o
Ceramic or Polymer Output Capacitors
MAX1510/MAX17510
The MAX1510/MAX17510 DDR linear regulators source
and sink up to 3A peak (typ) using internal n-channel
MOSFETs. These linear regulators deliver an accurate
0.5V to 1.5V output from a low-voltage power input (V
IN
= 1.1V to 3.6V). The MAX1510/MAX17510 use a sepa-
rate 3.3V bias supply to power the control circuitry and
drive the internal n-channel MOSFETs.
The MAX1510/MAX17510 provide current and thermal
limits to prevent damage to the linear regulator.
Additionally, the MAX1510/MAX17510 generate a
power-good (PGOOD) signal to indicate that the output
is in regulation. During startup, PGOOD remains low
until the output is in regulation for 2ms (typ). The internal
soft-start limits the input surge current.
The MAX1510/MAX17510 power the active-DDR termi-
nation bus that requires a tracking input reference. The
MAX1510/MAX17510 can also be used in low-power
chipsets and graphics processor cores that require
dynamically adjustable output voltages. The
MAX1510/MAX17510 are available in a 10-pin, 3mm x
3mm thin DFN package.
Ordering Information
PART
MAX1510ETB
MAX1510ETB+
MAX1510ATB/V+
MAX17510ATB+
MAX17510ATB/V+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
TOP
MARK
ARD
ABD
AWD
AWQ
AWQ
Applications
Notebook/Desktop Computers
DDR Memory Termination
Active Termination Buses
Graphics Processor Core Supplies
Chipset/RAM Supplies as Low as 0.5V
+Denotes
a lead(Pb)-free and RoHS-compliant package.
*EP
= Exposed pad.
/V denotes an automotive qualified part.
Pin Configuration
TOP VIEW
IN
10
Typical Operating Circuit
V
IN
(1.1V TO 3.6V)
IN
OUT
OUTS
V
OUT
= V
TT
PGND
SHDN
7
9
8
OUTS
6
V
BIAS
(2.7V TO 3.6V)
OUT
MAX1510
MAX17510
V
CC
SHDN
PGND
AGND
MAX1510
MAX17510
+
1
REFOUT
2
V
CC
3
AGND
4
REFIN
5
PGOOD
V
DDQ
(2.5V OR 1.8V)
PGOOD
V
REFOUT
= V
TTR
REFIN
REFOUT
TDFN
3mm x 3mm
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
________________________________________________________________
Maxim Integrated Products
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.
Low-Voltage DDR Linear Regulators
MAX1510/MAX17510
ABSOLUTE MAXIMUM RATINGS
IN to PGND............................................................-0.3V to +4.3V
OUT to PGND ..............................................-0.3V to (V
IN
+ 0.3V)
OUTS to AGND ............................................-0.3V to (V
IN
+ 0.3V)
V
CC
to AGND.........................................................-0.3V to +4.3V
REFIN, REFOUT,
SHDN,
PGOOD to AGND ..-0.3V to (V
CC
+ 0.3V)
PGND to AGND .....................................................-0.3V to +0.3V
REFOUT Short Circuit to AGND .................................Continuous
OUT Continuous RMS Current: 100s ..................................±1.6A
1s......................................±2.5A
Continuous Power Dissipation (T
A
= +70°C)
10-Pin 3mm x 3mm Thin DFN
(derated 24.4mW/°C above +70°C)...........................1951mW
Operating Temperature Range
MAX1510ETB...................................................-40°C to +85°C
MAX17510ATB ..............................................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free packages..............................................+260°C
Packages containing lead(Pb).....................................+240°C
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
(V
IN
= 1.8V, V
CC
= 3.3V, V
REFIN
= V
OUTS
= 1.25V,
SHDN
= V
CC
, circuit of Figure 1, T
J
= T
A
= -40°C to +85°C for MAX1510ETB, T
J
=
T
A
= -40°C to +125°C for MAX17510ATB, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Input-Voltage Range
Quiescent Supply Current (V
CC
)
Shutdown Supply Current (V
CC
)
Quiescent Supply Current (V
IN
)
Shutdown Supply Current (V
IN
)
Feedback-Voltage Error
Load-Regulation Error
Line-Regulation Error
OUTS Input-Bias Current
OUTPUT
Output Adjust Range
OUT On-Resistance
Output Current Slew Rate
OUT Power-Supply Rejection
Ratio
OUT-to-OUTS Resistance
Discharge MOSFET
On-Resistance
PSRR
R
OUTS
R
DISCHARGE
SHDN
= GND
High-side MOSFET (source) (I
OUT
= 0.1A)
Low-side MOSFET (sink) (I
OUT
= -0.1A)
C
OUT
= 100µF, I
OUT
= 0.1A to 2A
10Hz < f < 10kHz, I
OUT
= 200mA,
C
OUT
= 100µF
0.5
0.14
0.14
3
80
12
8
1.5
0.25
0.25
V
Ω
A/µs
dB
kΩ
Ω
I
OUTS
SYMBOL
V
IN
V
CC
I
CC
I
CC(SHDN)
I
IN
I
IN(SHDN)
V
OUTS
Power input
Bias supply
Load = 0, V
REFIN
> 0.45V
SHDN
= GND, V
REFIN
> 0.45V
SHDN
= GND, REFIN = GND
Load = 0
SHDN
= GND
REFIN to OUTS
I
OUT
=
±200mA
-1A
≤
I
OUT
≤
+1A
1.4V
≤
V
IN
≤
3.3V, I
OUT
= ±100mA
-1
T
A
= +25°C
T
A
= -40°C to +125°C
-4
-6
-15
1
+1
CONDITIONS
MIN
1.1
2.7
0.7
350
50
0.4
0.1
0
TYP
MAX
3.6
3.6
1.3
600
100
10
10
+4
+6
+15
UNITS
V
mA
µA
mA
µA
mV
mV
mV
µA
2
_______________________________________________________________________________________
Low-Voltage DDR Linear Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 1.8V, V
CC
= 3.3V, V
REFIN
= V
OUTS
= 1.25V,
SHDN
= V
CC
, circuit of Figure 1, T
J
= T
A
= -40°C to +85°C for MAX1510ETB, T
J
=
T
A
= -40°C to +125°C for MAX17510ATB, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
REFERENCE
REFIN Voltage Range
REFIN Input-Bias Current
REFIN Undervoltage-Lockout
Voltage
REFOUT Voltage
REFOUT Load Regulation
FAULT DETECTION
Thermal-Shutdown Threshold
V
CC
Undervoltage-Lockout
Threshold
IN Undervoltage-Lockout
Threshold
Current-Limit Threshold
Soft-Start Current-Limit Time
INPUTS AND OUTPUTS
PGOOD Lower Trip Threshold
PGOOD Upper Trip Threshold
PGOOD Propagation Delay
PGOOD Startup Delay
PGOOD Output Low Voltage
PGOOD Leakage Current
SHDN
Logic Input Threshold
SHDN
Logic Input Current
I
PGOOD
t
PGOOD
With respect to feedback threshold,
hysteresis = 12mV
With respect to feedback threshold,
hysteresis = 12mV
OUTS forced 25mV beyond PGOOD trip
threshold
Startup rising edge, OUTS within
±100mV
of
the feedback threshold
I
SINK
= 4mA
OUTS = REFIN (PGOOD high impedance),
PGOOD = V
CC
+ 0.3V, T
A
= +25°C
Logic-high
Logic-low
SHDN
= V
CC
or GND, T
A
= +25°C
0.8
-1
+1
-200
100
5
1
-150
150
10
2
-100
200
35
3.5
0.3
1
2.0
mV
mV
µs
ms
V
µA
V
V
µA
I
LIMIT
t
SS
T
SHDN
V
UVLO
Rising edge, hysteresis = 15°C
Rising edge, hysteresis = 100mV
Rising edge, hysteresis = 55mV
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
1.8
1.5
2.45
+165
2.55
0.9
3
3
200
2.65
1.1
4.2
4.2
°C
V
V
A
µs
V
REFOUT
ΔV
REFOUT
V
REFIN
I
REFIN
T
A
= +25°C
Rising edge, hysteresis = 50mV
V
CC
= 3.3V, I
REFOUT
= 0V
I
REFOUT
=
±5mA
V
REFIN
- 0.01
-20
0.5
-1
0.35
V
REFIN
1.5
+1
0.45
V
REFIN
+ 0.01
+20
V
µA
V
V
mV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1510/MAX17510
Note 1:
Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using statistical-quality-control (SQC) methods.
_______________________________________________________________________________________
3
Low-Voltage DDR Linear Regulators
MAX1510/MAX17510
Typical Operating Characteristics
(Circuit of Figure 1. T
A
= +25°C, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1510/MAX17510 toc02
OUTPUT LOAD REGULATION
V
REFIN
= 0.9V
MAX1510/MAX17510 toc01
OUTPUT LOAD REGULATION
1.300
3.0
V
REFIN
= 1.25V
V
OUT
= 0.9V
MAXIMUM OUTPUT CURRENT (A)
2.5
2.0
1.5
1.0
0.5
0
0.94
0.92
V
OUT
(V)
V
IN
= 1.5V
0.90
0.88
0.86
0.84
-3
-2
-1
0
I
OUT
(A)
1
2
3
V
IN
= 1.2V
V
OUT
= 1.25V
1.275
V
IN
= 1.8V
1.250
V
OUT
(V)
THERMALLY LIMITED
DROPOUT VOLTAGE LIMITED
1.225
V
IN
= 1.5V
1.200
-3
-2
-1
0
I
OUT
(A)
1
2
3
1.0
1.5
2.0
2.5
3.0
INPUT VOLTAGE (V)
INPUT CURRENT (I
IN
)
vs. INPUT VOLTAGE (V
IN
)
MAX1510/MAX17510 toc04
BIAS CURRENT (I
CC
)
vs. INPUT VOLTAGE (V
IN
)
MAX1510/MAX17510 toc05
BIAS CURRENT (I
CC
)
vs. LOAD CURRENT (I
OUT
)
V
IN
= 1.5V
1.2
1.0
I
CC
(mA)
0.8
V
OUT
= 0.90V
0.6
0.4
0.2
ENTERING
DROPOUT
V
OUT
= 1.25V
MAX1510/MAX17510 toc06
250
V
OUT
= 1.25V
V
OUT
= 0.90V
1.0
0.9
0.8
0.7
I
CC
(mA)
0.6
0.5
0.4
0.3
DROPOUT
V
OUT
= 1.25V
1.4
200
I
IN
(μA)
150
100
50
0.2
0.1
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V
IN
(V)
0
0
0.5
INPUT UVLO
1.0
1.5
2.0
2.5
3.0
3.5
0
-2
-1
0
I
OUT
(A)
1
2
V
IN
(V)
POWER GROUND CURRENT (I
PGND
)
vs. SOURCE LOAD CURRENT (I
OUT
)
MAX1510/MAX17510 toc07
INPUT CURRENT (I
IN
)
vs. SINK LOAD CURRENT (I
OUT
)
V
IN
= 1.5V
6
5
I
IN
(mA)
4
3
V
OUT
= 1.25V
2
V
OUT
= 0.90V
MAX1510/MAX17510 toc08
DROPOUT VOLTAGE
vs. OUTPUT CURRENT
MAX1510/MAX17510 toc09
0.25
V
IN
= 1.5V
0.20
7
0.6
0.5
DROPOUT VOLTAGE (V)
0.4
0.3
0.2
0.1
0
V
OUT
= 0.9V
V
OUT
= 1.25V
I
PGND
(mA)
0.15
V
OUT
= 1.25V
ENTERING
DROPOUT
0.10
0.05
V
OUT
= 0.90V
1
0
0
0
0.5
1.0
I
OUT
(A)
1.5
2.0
-2.0
-1.5
-1.0
I
OUT
(A)
-0.5
0.0
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (A)
4
_______________________________________________________________________________________
MAX1510/MAX17510 toc03
0.96
Low-Voltage DDR Linear Regulators
Typical Operating Characteristics (continued)
(Circuit of Figure 1. T
A
= +25°C, unless otherwise noted.)
REFOUT VOLTAGE ERROR
vs. REFOUT LOAD CURRENT
MAX1510/MAX17510 toc10
MAX1510/MAX17510
STARTUP WAVEFORM
MAX1510/MAX17510 toc11
SHUTDOWN WAVEFORM
5V
SHDN
0V
MAX1510/MAX17510 toc12
20
15
REFOUT VOLTAGE ERROR (mV)
10
5
0
-5
-10
-15
-20
-10
-5
0
5
R
LOAD
= 100Ω
5V
SHDN
0V
2V
1.25V
V
OUT
0V
4V
PGOOD
0V
1V
V
OUT
0V
4V
PGOOD
0V
100μs/div
10
500μs/div
REFOUT LOAD CURRENT (mA)
SOURCE LOAD TRANSIENT
MAX1510/MAX17510 toc13
SOURCE/SINK LOAD TRANSIENT
MAX1510/MAX17510 toc14
V
OUT
AC-COUPLED
1mV/div
V
OUT
AC-COUPLED
5mV/div
1A
I
OUT
0A
20.0μs/div
4.00μs/div
+1.5A
I
OUT
-1.5A
LINE TRANSIENT
MAX1510/MAX17510 toc15
DYNAMIC OUTPUT-VOLTAGE TRANSIENT
MAX1510/MAX17510 toc16
V
IN
= 1.5V
3.3V
V
IN
(1V/div)
1.5V
2.5V
V
DDQ
1.8V
1.2V
V
REFOUT
V
OUT
(10mV/div)
AC-COUPLED
0.9V
I
OUT
= 100mA
40μs/div
20.0μs/div
0.9V
1.2V
V
OUT
0.9V
_______________________________________________________________________________________
5
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