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MAX8969

Step-Up Converter for Handheld Applications

1A Boost Converter with Four External Components in a Small, 1.25mm x 1.25mm WLP Package

Data Sheet

Please check latest availability status for a specific part variant.

Overview

Description

The MAX8969 is a simple 1A step-up converter in a small package that operates in any single-cell Li-ion application. This IC provides protection features such as input undervoltage lockout, short circuit, and overtemperature shutdown.

The IC transitions to skip mode seamlessly under lightload conditions to improve efficiency. Under these conditions, switching occurs only as needed, reducing switching frequency and supply current to maintain high efficiency.

For higher efficiency when input voltage is closer to the output voltage, two special modes of operation are available: track and automatic track. These modes allow users to balance quiescent current (I_Q) vs. transient response time into boost mode. In both modes, the p-channel MOSFET acts as a current-limited switch such that V_OUT follows V_IN. However, in track mode, the boost circuits are disabled and the system controls the boost function with the EN, TREN inputs (I_Q = 30µA). In automatic track mode (ATM), the boost circuits are enabled and the device automatically transitions into boost mode when V_IN falls to 95% of the target V_OUT (I_Q = 60µA).

The IC is available in a small, 1.25mm × 1.25mm, 9-bump WLP (0.4mm pitch) package.

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MAX8969: Functional Diagram

MAX8969 is a simple 1A step-up converter in a small package that operates in any single-cell Li-ion application | Functional Diagram

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Key Features

Flexible System Integration
- Up to 1A Output Current
- 2.5V to 5.5V Input Voltage Range
- 3.3V to 5.7V Output Voltage Options
Integrated Protection Increases System Robustness
- Undervoltage Lockout (UVLO)
- Short-Circuit Protection
- Overtemperature Shutdown
High Efficiency and Low Quiescent Current Extends Battery Life
- Over 90% Efficiency with Internal Synchronous Rectifier
- 60µA I_Q in Automatic Track Mode
- 45µA I_Q in Step-Up Mode
- 30µA I_Q in Track Mode
- 1µA Shutdown Current
- Skip Mode Under Light Load Condition Improves Efficiency
- True Shutdown™ Prevents Current Flow from OUT_ to LX_
- Soft-Start Limits Inrush Current to 480mA
Small Package and High Frequency Operation Reduce Board Space
- 9-Bump 1.25mm × 1.25mm WLP Package
- 3MHz PWM Switching Frequency
- Small External Components

Applications/Uses

Cell Phones
eBooks
GPS, PND
Mobile Internet Devices
Smartphones

Parametric Specs

Part Number

V_IN
(V)

V_OUT1
(V)

Preset V_OUT
(V)

I_OUT1
(A)

Output Adjust. Method

Switch Type

Synchronous Switching

I_CC
(mA)

Shutdown Mode Supply Current
(µA)

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Budgetary
Price

min

max

min

max

typ

max

See Notes

MAX8969

2.5

5.5

3.3

Preset

Internal

Yes

0.045

0.8

3000

WLP/9

$0.49 @1k

See All Step-Up Switching Regulators (94)

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX8969EVKIT: Evaluation Kit for the MAX8969

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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