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MAX850, MAX851, MAX852, MAX853
Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias
1mVP-P Output Voltage Ripple (MAX853)
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Status
| Part Number |
Status |
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MAX850
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Active: In Production. |
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MAX851
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Active: In Production. |
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MAX852
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This product is No Longer Available. See Ordering Information for recommended replacements. |
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MAX853
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Active: In Production. |
Description
The MAX850-MAX853 low-noise, inverting, charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers.
The MAX850-MAX852 offer both preset (-4.1V) and adjustable (-0.5V to -9.0V) output voltages. The MAX853 uses an external positive control voltage to set the negative output voltage. Input voltage range for all four devices is 4.5V to 10V. Output current is 5mA.
An internal linear regulator reduces the output voltage ripple to 2mVP-P. With a well-filtered control voltage (VCTRL), the MAX853 achieves typical output ripple of less than 1mVP-P. Supply current is 3mA max, and shutdown current is less than 1µA max over temperature
(5µA max for MAX851).
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Data Sheet
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An evaluation kit is available: MAX850EVKIT
Key Features
- Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA
- 4.5V to 10V Input Voltage Range
- 2mVP-P Output Voltage Ripple (MAX850-MAX852)
- 1mVP-P Output Voltage Ripple (MAX853)
- 100kHz Charge-Pump Switching Frequency (MAX850/MAX851/MAX853)
- External Synchronizing Clock Input (MAX852)
- Logic-Level Shutdown Mode: 1µA Max Over Temperature (MAX850/MAX852/MAX853)
- Low Cost, 8-Pin SO Package
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Applications/Uses
- Cell Phones
- Continuously Adjustable GaAsFET Bias
- LCD-Bias Contrast Control
- Negative Regulated Power Supplies
- Personal Communicators, PDAs
- Wireless Data Loggers
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Key Specifications:
| Charge Pumps |
| Part Number |
Topology |
VIN
(V) |
VIN
(V) |
ICC
(mA) |
Unadj. VOUT
(V) |
Adj. VOUT
(V) |
Adj. VOUT
(V) |
IOUT
(A) |
Oper. Freq.
(kHz) |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
max |
min |
max |
typ |
max w/pins |
See Notes |
| MAX850 |
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4.5 |
10 |
3 |
-4.1 |
-VIN-0.6 |
-0.5 |
0.005 |
100 |
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30.9 |
$1.65 @1k |
| MAX851 |
-4.1 |
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$1.65 @1k |
| MAX853 |
-9 |
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$1.65 @1k |
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See All Charge Pumps (45)
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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
Didn't Find What You Need?
Information Index
Document Ref.: 19-0238
Rev 2;
1996-04-01
This page last modified: 2008-10-01
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