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MAX4772, MAX4773
200mA/500mA Selectable Current-Limit Switches
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Status
Active: In Production.
Description
The MAX4772/MAX4773 switches feature selectable internal current limiting to prevent damage to host devices due to faulty load conditions. The MAX4772/MAX4773 include a logic input to select a guaranteed 200mA or 500mA current limit, making them ideal for SDIO and other load-switching applications. These analog switches have a low 0.2Ω on-resistance and operate from a 2.0V to 4.5V input voltage range.
When the switch is on and a load is connected to the port, a guaranteed blanking time of 14ms ensures that the transient voltage settles down. If, after this blanking time, the load current is greater than the current limit, the MAX4772 switch is turned off and issues an active-low FLAG to the microprocessor. The switch can be turned on again by cycling the power or the ON input.
The MAX4773 has an autoretry feature where the switch turns off and issues an active-low FLAG to the microprocessor after the blanking time and then continuously checks to see if the overload condition is present. The switch remains on after the overload condition disappears and active-low FLAG deasserts.
The MAX4772/MAX4773 are available in tiny space-saving 6-pin SOT23 and 6-pin TDFN (3mm x 3mm) packages.
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Data Sheet
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Key Features
- Guaranteed Current Limit: 200mA or 500mA
- Thermal-Shutdown Protection
- Reverse-Current Protection
- 0.2Ω On-Resistance (SEL = High)
- 14ms Guaranteed Blanking Time
- Active-Low FLAG Function
- Autoretry (MAX4773)
- 80µA Supply Current
- 6µA Latch-Off Current (MAX4772)
- 0.01µA Shutdown Current
- 2.0V to 4.5V Supply Range
- Fast Current-Limit Response Time
- Tiny SOT23 and TDFN Packages
- UL Certification Pending
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Applications/Uses
- Cell Phones
- Global Positioning Systems (GPS)
- Handheld Devices
- PDAs and Palmtop Devices
- SDIO
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Key Specifications:
| Current Limit and USB Power Switches |
| Part Number |
Power Switches |
Current Limit
(mA) |
Current Limit
(mA) |
Fault Indicator |
Current Limit Accuracy
(%) |
Current Limit Set By |
Lowest Adj. Setting
(A) |
RON
(Ω) |
VSUPPLY
(V) |
VSUPPLY
(V) |
Oper. Temp.
(°C) |
Package/Pins |
Budgetary Price |
| ≥ |
≤ |
typ |
min |
max |
See Notes |
| MAX4772 |
1 |
500 |
500 |
Yes |
23 |
Pin Select |
0.2 |
0.2 |
2 |
4.5 |
-40 to +85 |
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$1.08 @1k |
| MAX4773 |
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$1.08 @1k |
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See All Current Limit and USB Power Switches (77)
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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
Product Guides
Reliability Reports
| Reliability Report: |
MAX4773.pdf |
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX4772ETT+T
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Active |
TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4772ETT-T
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Active |
TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4772EUT+T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4772EUT-T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4773ETT-T
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Active |
TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4773EUT+
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4773EUT+T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4773EUT-T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2926
Rev 0;
2003-08-14
This page last modified: 2009-12-04
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