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MAX8563, MAX8564, MAX8564A
±1%, Ultra-Low Output Voltage, Dual and Triple Linear n-FET Controllers
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Status
Active: In Production.
Description
The MAX8563/MAX8564/MAX8564A ultra-low-output dual
and triple LDO controllers allow flexible and inexpensive
point-of-load voltage conversion in motherboards,
desknotes, notebooks, and other applications.
These parts feature a 0.5V reference voltage with ±1%
accuracy providing tight regulation of the output voltage.
The MAX8563 has three n-channel MOSFET controller
outputs, and the MAX8564/MAX8564A has two
controller outputs.
Each controller output is adjustable from 0.5V to 3.3V
when VDD = 12V and between 0.5V and 1.8V when VDD
= 5V. Each output is independently enabled and asserts
a POK signal when the output reaches 94% of the set
value. Each output is protected against a soft short-circuit
condition by an undervoltage comparator that disables
the output when it drops to under 80% of the set voltage
for more than 50µs. For a catastrophic short condition, the
regulators are shut down immediately if the output drops
below 60% of the set voltage.
The MAX8563 is available in a 16-pin QSOP
package, and the MAX8564/MAX8564A are available
in a 10-pin µMAX® package.
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Data Sheet
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An evaluation kit is available: MAX8564EVKIT
Key Features
- MAX8563: 3 Outputs
- MAX8564/MAX8564A: 2 Outputs
- ±1% Feedback Regulation
- Adjustable Output Voltage Down to 0.5V
- Can Use Ceramic Output Capacitors
- Wide Supply Voltage Range Permits Operation from 5V or 12V Rails
- Individual Enable Control and POK Signal Allows Sequencing
- Overload Protection Against Soft Short-Circuit Condition
- Undervoltage Short-Circuit Protection
- Drive n-Channel MOSFETs
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Applications/Uses
- Desknotes and Notebooks
- Dual/Triple Power Supplies
- Graphic Cards
- Low-Voltage DSP, µP, and Microcontroller Power Supplies
- Motherboards
- Ultra-Low-Dropout Voltage Regulators
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Key Specifications:
| Linear Regulators |
| Part Number |
Regulators |
VIN
(V) |
VIN
(V) |
Adj. VOUT
(V) |
Adj. VOUT
(V) |
VDROPOUT @Rated ILOAD
(V) |
Rated ILOAD
(mA) |
ICC
(µA) |
Low Batt./ Pwr. Fail Out |
POK/Reset Thresh.
(V) |
Watchdog |
Reverse Batt. Protect. |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
typ |
max |
nom |
max w/pins |
See Notes |
| MAX8563 |
3 |
4.5 |
13.2 |
0.5 |
5 |
0.056 |
3000 |
1600 |
No |
Vout-12% |
No |
No |
-40 to +85 |
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30.9 |
$1.19 @1k |
| MAX8564 |
2 |
1200 |
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15.4 |
$1.01 @1k |
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See All Linear Regulators (149)
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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 prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3290
Rev 2;
2006-09-14
This page last modified: 2007-09-25
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