MAX1515ETG+ by Analog Devices

Low-Voltage, Internal Switch, Step-Down/DDR Regulator


The MAX1515 constant-off-time, pulse-width-modulated (PWM) source/sink step-down DC-DC converter is optimized for use in low-voltage active-termination power rails or chipset power supplies in notebook and sub-notebook computers. This device features dual internal n-channel MOSFET power switches for high efficiency and reduced component count. External Schottky diodes are not required. An integrated boost switch eliminates the need for an external boost diode. The internal 40mΩ NMOS power switches easily source and sink continuous load currents up to 3A. The MAX1515 produces an adjustable output from +0.5V to +2.7V and achieves efficiencies as high as 95%. The MAX1515 can be configured as a DDR regulator, producing an output that is exactly half the memory supply rail. The input of the power stage can be taken from the memory supply rail itself, resulting in an efficient power supply that returns the energy to the rail from which it was sourced. The MAX1515 includes a reference buffer that provides ±5mA of drive current. The MAX1515 uses a unique current-mode, constant-off-time, PWM control scheme. A selectable pulse-skipping mode maintains high efficiency during light-load operation, yet still sources and sinks current on demand. The MAX1515 can also be operated in fixed-PWM mode for low output ripple. The programmable constant-off-time architecture sets switching frequencies up to 1MHz, which allows the user to optimize performance trade-offs between efficiency, output switching noise, component size, and cost. The MAX1515 features an adjustable soft-start to limit surge currents during startup and a low-power shutdown mode to disconnect the input from the output and reduce supply current below 1µA. The MAX1515 is available in a 24-pin thin QFN package with an exposed backside pad.

Where to Buy

Prices starting from US$7.39

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Features

Dual 40mΩ Internal n-Channel MOSFETs
Integrated Boost Switch
+1.3V to +3.6V Input Voltage Range
1% VOUT Accuracy Over Line and Load
1MHz Maximum Switching Frequency
DDR Termination Regulator (DDR Mode)
Tracking Output Voltage
Source/Sink Pulse Skipping
±5mA Reference Buffer
Output Voltage (Non-DDR Mode)
+2.5V, +1.8V, or +1.5V Pin Selectable
+0.5V to +2.7V Adjustable
1.1V ±0.75% Reference Output
Adjustable Soft-Start Inrush Current Limiting
< 1µA (typ) Shutdown Supply Current
< 800µA (max) Operating Supply Current
Selectable Pulse-Skipping Operation at Light Loads
Positive and Negative Current Limit
Power-Good Window Comparator
Output Short-Circuit Protection

Specifications

VIN (V) (min) 1.3
VIN (V) (max) 3.6
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 2.7
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 1.51.82.5
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins TQFN/24
BudgetaryPrice (See Notes) 5.16


MAX1515ETG+ Power Management ICs - PMIC by Analog Devices

DDR TERMINATION REGULATOR 3A TDFN-24

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Memory Supported DDR2 DDR3 LPDDR3 DDR4 LPDDR4 QDR
Source / Sink Current 3A
Supply Voltage Min 1.3V
Supply Voltage Max 3.6V
DDR Regulator Case Style TDFN
No. of Pins 24Pins
Product Range -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
DC / DC Converter IC Case TQFN
Input Voltage Max 3.6V
Input Voltage Min 1.3V
No. of Outputs 1Outputs
Operating Temperature Max 85°C
Output Current 3A
Output Voltage Max 2.7V
Output Voltage Min 500mV
Switching Frequency 1MHz
Topology Synchronous Buck (Step Down)

Alternative Descriptions

Low-Voltage, Internal Switch, | Analog Devices
DDR TERMINATION REGULATOR, 3A, TDFN-24 | element14
Ddr Termination Regulator, 3A, Tdfn-24 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1515ETG+ ?

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Is the MAX1515ETG+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Analog Devices, element14, Farnell and Newark Electronics have stock available or on a lead time for MAX1515ETG+ .

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