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MAX1982, MAX1982EUT, MAX1983
Low-Voltage, Low-Dropout Linear Regulators with External Bias Supply
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Status
Active: In Production.
Description
The MAX1982/MAX1983 are low-voltage, low-dropout linear regulators with an external bias supply input. The 5V bias supply drives the gate of the internal N-channel pass transistor, making these devices ideal for applications that require low-voltage outputs from low-voltage inputs. The MAX1982 delivers 1.2V (±3%) at 300mA from an input voltage of 1.25V to 5.5V. The MAX1983 delivers an adjustable output voltage from 0.8V to 2V.
The MAX1982/MAX1983 include a current-limit and thermal shutdown that protects the regulator in the event of a fault condition. Both devices are offered in a 6-pin SOT23 package and are specified over the extended (-40°C to +85°C) temperature range.
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Data Sheet
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An evaluation kit is available: MAX1982EVKIT
Key Features
- Low-Cost 1.2V, 300mA VID Supply
- ±3% Output Voltage Accuracy
- No Minimum Load Current Required
- 1.25V to 5.5V Input Supply Voltage
- 5V Input Bias Supply Voltage
- Power-Good (PGOOD) Open-Drain Output with 1ms Rising Edge Propagation Delay (MAX1982)
- Adjustable Output Voltage (MAX1983)
- Low Supply Current (IBIAS + IIN = 165µA typ)
- 5µA (max) Shutdown Supply Current
- Tiny 6-Pin SOT23 Package
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Applications/Uses
- Cell Phones
- Low-Dropout Regulators with External Bias Supply
- Notebook Computers
- PDAs
- VID Power Supplies
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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 |
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 |
typ |
nom |
max w/pins |
See Notes |
| MAX1982 |
1 |
1.25 |
5.5 |
1.2 |
- |
- |
0.35 |
300 |
250 |
65 |
No |
No |
Vout-9% |
No |
No |
-40 to +85 |
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9 |
$0.86 @1k |
| MAX1983 |
- |
0.8 |
2 |
- |
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$0.87 @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
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Information Index
Document Ref.: 19-2560
Rev 1;
2009-06-03
This page last modified: 2009-06-03
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