MAX1587A
High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smartphones
High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smartphones Using Intel XScale Microprocessors
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Key Features
Applications/Uses
| VIN (V) (min) | 2.6 |
| VIN (V) (max) | 5.5 |
| # Step-Down Outputs | 3 |
| # LDO Outputs | 4 |
| VOUT (V) (min) | 0.7 |
| VOUT (V) (max) | 5.5 |
| Package/Pins | TQFN/40 |
| Budgetary Price (See Notes) | 5.39 |
Simplified Block Diagram
Technical Docs
| Data Sheet | High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smartphones | Jan 07, 2010 |
Support & Training
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Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
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Parameters
| VIN (V) (min) | 2.6 |
| VIN (V) (max) | 5.5 |
| # Step-Down Outputs | 3 |
| # LDO Outputs | 4 |
| VOUT (V) (min) | 0.7 |
| VOUT (V) (max) | 5.5 |
| Package/Pins | TQFN/40 |
| Budgetary Price (See Notes) | 5.39 |
Key Features
- Six Regulators in One Package:
- Step-Down DC-DC for I/O at 1.3A
- Step-Down DC-DC for Memory at 0.9A
- Step-Down Serial-Programmed DC-DC for CORE
- Three LDO Outputs for SRAM, PLL, and USIM
- Always-On Output for VCC_BATT
- Low Operating Current
- 60µA in Sleep Mode (Sleep LDOs On)
- 130µA with DC-DCs On (Core Off)
- 200µA All Regulators On, No Load
- 5µA Shutdown Current
- Optimized for XScale Processors
- Backup-Battery Input
- Separate ON Controls for Any Desired Power Sequencing
- 1MHz PWM Switching Allows Small External Components
- Tiny 6mm x 6mm, 40-Pin and 7mm x 7mm, 48-Pin Thin QFN Packages
Applications/Uses
- Internet Appliances and Web-Books
- PDA, Palmtop, and Wireless Handhelds
- Third-Generation Smart Cell Phones
Description
The ICs integrate seven high-performance, low-operating-current power supplies along with supervisory and management functions. Regulator outputs include three step-down DC-DC outputs, three linear regulators, and a seventh always-on output. DC-DC converter outputs power I/O, DRAM, and the CPU core. The I/O supply can be preset to 3.3V or 3.0V, or can be adjusted to other values. The DRAM supply on the MAX1586A and MAX1587A is preset for 1.8V or 2.5V, while the MAX1586B DRAM supply is preset for 3.3V or 2.5V. The DRAM supply on all parts can also be adjusted with external resistors. The CPU core supply is serial programmed for dynamic voltage management. Linear-regulated outputs are provided for SRAM, PLL, and USIM supplies.
To minimize sleep-state quiescent current, critical power supplies have bypass "sleep" LDOs that can be activated to minimize battery drain when output current is very low. Other functions include separate on/off control for all DC-DC converters, low-battery and dead-battery detection, a reset and power-OK output, a backup-battery input, and a two-wire serial interface.
All DC-DC outputs use fast, 1MHz PWM switching and small external components. They operate with fixed-frequency PWM control and automatically switch from PWM to skip-mode operation at light loads to reduce operating current and extend battery life. The core output is capable of operating in forced-PWM mode at all loads to minimize ripple and noise. A 2.6V to 5.5V input voltage range allows 1-cell lithium-ion (Li+), 3-cell NiMH, or a regulated 5V input. The MAX1587 is available in a tiny 6mm x 6mm, 40-pin thin QFN package. The MAX1586 features an additional linear regulator (V6) for VCC_USIM and low-battery and dead-battery comparators. The MAX1586 is available in a 7mm x 7mm, 48-pin thin QFN package.
Technical Docs
| Data Sheet | High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smartphones | Jan 07, 2010 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
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