MAX1541 ,Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear RegulatorApplications Overvoltage/Undervoltage-Protection OptionNotebook Computers 1.7ms Digital Soft-Star ..
MAX1541ETL ,Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear RegulatorApplications♦ Overvoltage/Undervoltage-Protection OptionNotebook Computers♦ 1.7ms Digital Soft-Star ..
MAX1541ETL ,Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear RegulatorELECTRICAL CHARACTERISTICS(V+ = 15V, V = V = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, T = ..
MAX1541ETL+ ,Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear RegulatorELECTRICAL CHARACTERISTICS(V+ = 15V, V = V = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, T = ..
MAX1541ETL+T ,Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear RegulatorFeatures♦ Inductor-Saturation ProtectionThe MAX1540A/MAX1541 dual pulse-width modulation(PWM) contr ..
MAX1543ETP+ ,TFT LCD DC-to-DC Converter with Operational AmplifiersELECTRICAL CHARACTERISTICS(V = 3V, V = 8V, V = 28V, FREQ = IN (MAX1543), PGND = AGND = 0, T = 0°C t ..
MAX4185EUB+T ,Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with ShutdownELECTRICAL CHARACTERISTICS—Dual Supplies (V = +5V, V = -5V, V + = 0, SHDN ≥ 3V; T = T to T , unless ..
MAX4186ESD ,Single/Dual/Quad / 270MHz / 1mA / SOT23 / Current-Feedback Amplifiers with Shutdownapplications.The single MAX4180/MAX4181 are offered in space-saving 6-pin SOT23 packages. Ordering ..
MAX4187EEE+ ,Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with ShutdownApplicationsTEMP PIN- TOPPortable/Battery-Powered High-Definition PARTRANGE PACKAGE MARKVideo/Multi ..
MAX4187ESD ,Single/Dual/Quad / 270MHz / 1mA / SOT23 / Current-Feedback Amplifiers with ShutdownELECTRICAL CHARACTERISTICS—Dual Supplies (continued)(V = +5V, V = -5V, V + = 0V, SHDN ‡ 3V; T = T t ..
MAX4188ESD ,Single/Triple / Low-Glitch / 250MHz / Current- Feedback Amplifiers with High-Speed DisableELECTRICAL CHARACTERISTICS—Dual Supplies(V = +5V; V = -5V; IN+ = 0; DISABLE_ ‡ 3.2V; MAX4188: A = + ..
MAX4189ESD ,Triple, low-glitch, 250MHz -3dB bandwidth, 1.5mA supply current, current-feedback amplifier. Optimized for Av>=1V/V.ELECTRICAL CHARACTERISTICS—Dual Supplies(V = +5V; V = -5V; IN+ = 0; DISABLE_ ‡ 3.2V; MAX4188: A = + ..
MAX1541
Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator
General DescriptionThe MAX1540/MAX1541 dual pulse-width modulation
(PWM) controllers provide the high efficiency, excellent
transient response, and high DC-output accuracy nec-
essary for stepping down high-voltage batteries to gen-
erate low-voltage chipset and RAM power supplies in
notebook computers.
The Maxim proprietary Quick-PWM™ controllers are
free running, constant on-time with input feed forward.
This configuration provides ultra-fast transient
response, wide input-output (I/O) differential range, low
supply current, and tight load-regulation characteris-
tics. The controllers can accurately sense the inductor
current across an external current-sense resistor in
series with the output to ensure reliable overload and
inductor saturation protection. Alternatively, the con-
trollers can use the synchronous rectifier itself or loss-
less inductor current-sensing methods to provide
overload protection with lower power dissipation.
For a single step-down PWM controller with inductor-
saturation protection, external-reference input voltage,
and dynamically selectable output voltages, refer to the
MAX1992/MAX1993 data sheet.
ApplicationsNotebook Computers
Core/IO Supplies as Low as 0.7V
0.7V to 5.5V Supply Rails
CPU/Chipset/GPU with Dynamic Voltage Core
Supplies (MAX1541)
DDR Memory Termination (MAX1541)
Active Termination Buses (MAX1541)
FeaturesInductor-Saturation ProtectionAccurate Differential Current-Sense InputsDual Ultra-High-Efficiency Quick-PWMs with
100ns Load-Step ResponseMAX1540
1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable
Output (OUT1)
2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Fixed 5V, 100mA Linear RegulatorMAX1541
External Reference Input (REFIN1)
Dynamically Selectable Output Voltage—0.7V
to 5.5V (OUT1)
2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Optional Power-Good and Fault Blanking
During Transitions
Fixed 5V or Adjustable 100mA Linear Regulator1% VOUTAccuracy over Line and Load2V to 28V Battery Input Range170kHz to 620kHz Selectable Switching
FrequencyOvervoltage/Undervoltage-Protection Option1.7ms Digital Soft-StartDrives Large Synchronous-Rectifier FETs2V ±0.7% Reference OutputSeparate Power-Good Window Comparators
MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
Pin ConfigurationsQuick-PWM is a trademark of Maxim Integrated Products, Inc.
*Future product—contact factory for availability.
Ordering Information
MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ABSOLUTE MAXIMUM RATINGSStresses 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.
Note 1:For the MAX1540, the gate-driver input supply (VDD) is internally connected to the fixed 5V linear-regulator output (LDOOUT),
and the linear-regulator input supply (LDOIN) is internally connected to the battery voltage input (V+).
V+, LDOON to GND...............................................-0.3V to +28V
LDOOUT to GND (MAX1540, Note 1)......................-0.3V to +6V
LDOOUT to GND (MAX1541, Note 1)....................-0.3V to +28V
VDDto GND (MAX1541, Note 1)..............................-0.3V to +6V
VCC, ON_ to GND.....................................................-0.3V to +6VSKIP, PGOOD_ to GND............................................-0.3V to +6V
FB_, CSP_, ILIM_ to GND.........................................-0.3V to +6V
TON, OVP/UVP, LSAT to GND...................-0.3V to (VCC+ 0.3V)
REF, OUT_ to GND.....................................-0.3V to (VCC+ 0.3V)
LDOIN to GND (MAX1541).....................................-0.3V to +28V
REFIN1, GATE, OD, FBLDO to GND (MAX1541).....-0.3V to +6V
FBLANK, CC1 to GND (MAX1541).............-0.3V to (VCC+ 0.3V)
DL_ to GND (Note 1)..................................-0.3V to (VDD+ 0.3V)
CSN_ to GND............................................................-2V to +30V
DH_ to LX_..................................................-0.3V to (BST + 0.3V)
LX_ to GND................................................................-2V to +30V
BST_ to LX_..............................................................-0.3V to +6V
REF Short Circuit to GND...........................................Continuous
Continuous Power Dissipation (TA= +70°C)
32-Pin 5mm x 5mm Thin QFN (derated 21.3mW/°C
above +70°C).............................................................1702mW
40-Pin 6mm x 6mm Thin QFN (derated 26.3mW/°C
above +70°C).............................................................2105mW
Operating Temperature Range
MAX154_ET_...................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(V+ = 15V, VCC= VDD= ON1 = ON2 = 5V, SKIP= GND, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)(V+ = 15V, VCC= VDD= ON1 = ON2 = 5V, SKIP= GND, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
