MAX1630, MAX1631, MAX1632, MAX1633, MAX1634, MAX1635 多输出、低噪声电源控制器，用于笔记本电脑

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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.

关键特性

应用/使用

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

	台式CPU本地DC-DC转换器
	笔记本电脑和亚笔记本电脑
	PDA与移动通信

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Fixed Freq/PWM Operation

Operating Freq. (kHz)

Internal Power Switch(es)

Synchronous Rectifier

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX1630

Step-Down

4.2

3.3

2.5

0.267

Yes

200
300

Yes

SSOP/28

MAX1631

3.3

$5.45 @ 1k

MAX1632

12
3.3

$5.68 @ 1k

MAX1633

3.3

MAX1634

3.3

Automotive - AECQ100
Automotive - General

$4.27 @ 1k

MAX1635

12
3.3

See All Switch-Mode DC-DC Power Supplies (418)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.