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All versions are Not Recommended for New Designs. See Ordering Information for recommended replacements.

Data Sheet

FULL DATA SHEET (PDF, 288kB) Download   E-Mail

Description

The MAX1630–MAX1635 are buck-topology, step-down, switch-mode, power-supply controllers that generate logic-supply voltages in battery-powered systems. These high-performance, dual/triple-output devices include on-board power-up sequencing, power-good signaling with delay, digital soft-start, secondary winding control, low-dropout circuitry, internal frequency-compensation networks, and automatic bootstrapping. Up to 96% efficiency is achieved through synchronous rectification and Maxim's proprietary Idle Mode™ control scheme. Efficiency is greater than 80% over a 1000:1 load-current range, which extends battery life in system-suspend or standby mode. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Strong 1A on-board gate drivers ensure fast external N-channel MOSFET switching. These devices feature a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode. This reduces noise and RF interference in sensitive mobile communications and pen-entry applications. Asserting the active-low SKIP pin enables fixed-frequency mode, for lowest noise under all load conditions. The MAX1630–MAX1635 include two PWM regulators, adjustable from 2.5V to 5.5V with fixed 5.0V and 3.3V modes. All these devices include secondary feedback regulation, and the MAX1630/MAX1632/MAX1633/ MAX1635 each contain 12V/120mA linear regulators. The MAX1631/MAX1634 include a secondary feedback input (SECFB), plus a control pin (STEER) that selects which PWM (3.3V or 5V) receives the secondary feedback signal. SECFB provides a method for adjusting the secondary winding voltage regulation point with an external resistor divider, and is intended to aid in creating auxiliary voltages other than fixed 12V. The MAX1630/MAX1631/MAX1632 contain internal output overvoltage and undervoltage protection features.

An evaluation kit is available:  MAX1630EVKIT, MAX1631EVKIT, MAX1632EVKIT  

Key Features		Applications/Uses
96% Efficiency +4.2V to +30V Input Range 2.5V to 5.5V Dual Adjustable Outputs Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™) 12V Linear Regulator Adjustable Secondary Feedback (MAX1631/MAX1634) 5V/50mA Linear Regulator Output Precision 2.5V Reference Output Programmable Power-Up Sequencing Power-Good (active-low RESET) Output Output Overvoltage Protection (MAX1630/MAX1631/MAX1632) Output Undervoltage Shutdown (MAX1630/MAX1631/MAX1632) 200kHz/300kHz Low-Noise, Fixed-Frequency Operation Low-Dropout, 99% Duty-Factor Operation 2.5mW Typical Quiescent Power (+12V input, both SMPSs on) 4µA Typical Shutdown Current 28-Pin SSOP Package		Desktop CPU Local DC-DC Converters Notebook and Subnotebook Computers PDAs and Mobile Communicators

Application Notes

Application Note 1845: Choosing the Right DC-DC Converter for Automotive Applications - MAX1634

Evaluation Kits

MAX1630EVKIT, MAX1631EVKIT, MAX1632EVKIT

Design Guides

Wireless (PDF)

Reliability Reports

Reliability Report: AEC-MAX1634EAI_A.pdf MAX1634EAI.pdf Show FIT data for: MAX1630 MAX1631 MAX1632 MAX1633 MAX1634 MAX1635 Request Reliability Report for: MAX1630 MAX1631 MAX1632 MAX1633 MAX1635

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-32 of 32

MAX1630	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1630CAI			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1630CAI-T			NRND	MAX1631AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1630EAI			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1630EAI-T			NRND	MAX1631AEAI+	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1631	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1631EAI+			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1631EAI+T			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1631CAI			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1631CAI-T			NRND	MAX1631AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1631EAI			NRND	MAX1631AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1631EAI-T			NRND	MAX1631AEAI+	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1632	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1632CAI			NRND	MAX1632AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1632CAI-T			NRND	MAX1632AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1632EAI			NRND	MAX1632AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1632EAI-T			NRND	MAX1632AEAI+	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1632EAI+			NRND	MAX1632AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1632EAI+T			NRND	MAX1632AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1633	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1633CAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1633CAI-T			NRND	MAX1634AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1633EAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1633EAI-T			NRND	MAX1634AEAI+	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1634	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1634CAI+			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1634CAI+T			NRND	MAX1634AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1634CAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1634CAI-T			NRND	MAX1634AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1634EAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1634EAI-T			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1634EAI+			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1634EAI+T			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1635	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1635CAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1635CAI-T			NRND	MAX1634AEAI+	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1635EAI			NRND	MAX1634AEAI+	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1635EAI-T			NRND	MAX1634AEAI+	Land Pattern: Not Available	-40°C to +85°C	See data sheet

Notes and Comments

High-efficiency dual 3V and 5V controller for notebook computers MAX1631/1634 include secondary feedback MAX1630/1632/1633/1634 include +12V LDO MAX1630/1631/1632 include Under/Over Voltage protection

Related Products

MAX783, MAX783EVKIT Triple-Output Power Supply Controller for Notebook Computers MAX782, MAX782R, MAX782S Triple-Output Power Supply Controller for Notebook Computers MAX786, MAX786R, MAX786S Dual-Output Power Supply Controller for Notebook Computers

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