MAX1536ETI+ by Analog Devices

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-Down Regulator with Dynamic Output Voltage Control


The MAX1536 constant-off-time, pulse-width-modulated (PWM) step-down DC-to-DC converter is ideal for use in +5.0V and +3.3V to low voltages for notebook and subnotebook computers. The MAX1536 features an internal PMOS power switch and internal synchronous rectification for high efficiency and reduced component count. No external Schottky diode is required across the internal synchronous rectifier switch. The internal 54mΩ PMOS power switch and 47mΩ NMOS synchronous-rectifier switch easily deliver continuous load currents up to 3.6A. The MAX1536 produces dynamically adjustable output voltages for chipsets and graphics processor cores using a logic-level control signal. The MAX1536 achieves efficiencies as high as 96%. The MAX1536 uses a unique current-mode, constant-off-time, PWM control scheme. It has selectable Idle Mode™ to maintain high efficiency during light-load operation, or fixed-PWM mode for low output ripple. The programmable constant-off-time architecture allows a wide range of switching frequencies up to 1.4MHz, optimizing performance trade-offs between efficiency, output switching noise, component size, and cost. The MAX1536 features a digital soft-start to limit surge currents during startup, a 100% duty-cycle mode for low-dropout operation, and a low-power shutdown mode that disconnects the input from the output and reduces supply current below 1µA. The MAX1536 is available in a 28-pin thin QFN package with an exposed backside pad.

Where to Buy

Prices starting from US$2.58

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Features

Dynamically Selectable Output Voltage from +0.7V to VIN
Internal PMOS/NMOS Switches 54mΩ/47mΩ On-Resistance at VIN = +4.5V 63mΩ/53mΩ On-Resistance at VIN = +3.0V
54mΩ/47mΩ On-Resistance at VIN = +4.5V
63mΩ/53mΩ On-Resistance at VIN = +3.0V
+3.0V to +5.5V Input Voltage Range
1.4MHz Maximum Switching Frequency
2V ±0.75% Reference Output
Constant-Off-Time PWM Operation
Selectable Idle Mode/PWM Operation at Light Loads
100% Duty Factor in Dropout
Digital Soft-Start Inrush Current Limiting
<1µA Typical Shutdown Supply Current
<750µA Quiescent Supply Current
Thermal Shutdown
1% VOUT Accuracy Over Line and Load
External Reference Input
Power-Good Window Comparator
Selectable Power-Good Blanking Time During Output-Voltage Transition

Specifications

VIN (V) (min) 3
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.7
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3.6
Switch Type Internal
Output Adjust. Method Dyn. REF InResistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1400
Package/Pins TQFN/28
BudgetaryPrice (See Notes) 6.75


MAX1536ETI+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 1.4MHZ TQFN-28

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

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 3V
Input Voltage Max 5.5V
No. of Outputs 1Outputs
DC / DC Converter IC Case TQFN
No. of Pins 28Pins
Output Current 3.6A
Output Voltage Min 700mV
Output Voltage Max 5.5V
Switching Frequency 1.4MHz
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

3.6A, 1.4MHz, Low-Voltage, Int | Analog Devices
Dc/Dc Conv, Sync Buck, 1.4Mhz, Tqfn-28 | Newark Electronics
DC/DC CONV, SYNC BUCK, 1.4MHZ, TQFN-28 | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1536ETI+ ?

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Is the MAX1536ETI+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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