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MAX8840, MAX8841, MAX8842
Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN
Ultra-Low-Noise, Low-Dropout, 150mA Linear Regulator Requires Only 3.9mm2 Total Solution Size without Compromising Performance
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Status
Active: In Production.
Description
The MAX8840/MAX8841/MAX8842 ultra-low-noise, low-dropout
(LDO) linear regulators are designed to deliver
up to 150mA continuous output current. These regulators
achieve a low 120mV dropout for 120mA load current.
The MAX8840 uses an advanced architecture to
achieve ultra-low output voltage noise of 11µVRMS and
PSRR of 54dB at 100kHz.
The MAX8841 does not require a bypass capacitor,
hence achieving the smallest PC board area. The
MAX8842 output voltage can be adjusted with an external
divider.
The MAX8840/MAX8841 are preset to a variety of voltages
in the 1.5V to 4.5V range. Designed with a p-channel
MOSFET series pass transistor, the MAX8840/MAX8841/MAX8842 maintain very low ground current (40µA).
The regulators are designed and optimized to work with
low-value, low-cost ceramic capacitors. The MAX8840
requires only 1µF (typ) of output capacitance for stability
with any load. When disabled, current consumption drops
to below 1µA.
The MAX8840/MAX8841/MAX8842 are available in a tiny
1mm x 1.5mm x 0.8mm µDFN.
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Data Sheet
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Key Features
- Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN
- 11µVRMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8840)
- 78dB PSRR at 1kHz (MAX8840)
- 120mV Dropout at 120mA Load
- Stable with 1µF Ceramic Capacitor for Any Load
- Guaranteed 150mA Output
- Only Need Input and Output Capacitors (MAX8841)
- Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and Adjustable (MAX8842)
- Low 40µA Ground Current
- Excellent Load/Line Transient
- Overcurrent and Thermal Protection
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Applications/Uses
- Base Stations
- Bluetooth® Portable Radios and Accessories
- Cellular and Cordless Phones
- Digital Cameras
- PDA and Palmtop Computers
- Personal Stereos
- Portable and Battery-Powered Equipment
- Wireless LANs
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Key Specifications:
| Linear Regulators |
| Part Number |
Regulators |
VIN
(V) |
VIN
(V) |
Preset VOUT
(V) |
Adj. VOUT
(V) |
Adj. VOUT
(V) |
VDROPOUT @Rated ILOAD
(V) |
Rated ILOAD
(mA) |
ICC
(µA) |
Output Voltage Noise
(µV RMS) |
Ref. Bypass |
Low Batt./ Pwr. Fail Out |
Watchdog |
Reverse Batt. Protect. |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
typ |
max |
typ |
max w/pins |
See Notes |
| MAX8840 |
1 |
2 |
6 |
| 1.5 | | 1.6 | | 1.8 | | 1.9 | | 2.5 | | 2.6 | | 2.7 | | 2.8 | | 2.85 | | 2.9 | | 3 | | 3.1 | | 3.3 | | 4.5 |
|
- |
- |
0.17 |
150 |
90 |
11 |
Yes |
No |
No |
No |
-40 to +85 |
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1.6 |
$0.54 @1k |
| MAX8841 |
| 1.5 | | 1.6 | | 1.8 | | 1.9 | | 2.5 | | 2.6 | | 2.7 | | 2.8 | | 2.85 | | 2.9 | | 3 | | 3.1 | | 3.3 | | 4.5 |
|
- |
- |
230 |
No |
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$0.54 @1k |
| MAX8842 |
- |
1.225 |
5 |
230 |
No |
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$0.54 @1k |
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See All Linear Regulators (146)
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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.: 19-0629
Rev 1;
2007-02-02
This page last modified: 2007-04-19
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