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MAX5977A, MAX5977B
1V to 16V, Single-Channel, Hot-Swap Controllers with Precision Current-Sensing Output
1V to 16V, Hot-Swap Controller with Precision Current-Sense Output
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Status
Active: In Production.
Description
The MAX5977A/MAX5977B hot-swap controllers provide complete protection for systems with a 1V to 16V single-supply voltage.
During the initial insertion, the hot-swap controllers limit the inrush current from damaging the board or from shorting out the backplane. When the input voltage is above the undervoltage threshold and below the overvoltage threshold, a 5µA current source powered from the internal 5V charge pump drives the gate of an external n-channel MOSFET providing a slow turn-on response. An internal current-sense amplifier in the IC monitors the current across an external shunt resistor providing current sensing for wide input-sense voltage range. The devices provide two levels of overcurrent circuit-breaker protections: a fast-trip threshold for a fast turn-off and a lower slow-trip threshold for a delayed turn-off.
Exceeding either of the overcurrent circuit-breaker thresholds will force the device into fault mode where the external n-channel MOSFET is disabled. The MAX5977 is available in two versions which provide a latched off (MAX5977A) or autoretry (MAX5977B) output when the device is in fault mode.
A calibration mode allows further calibration of the integrated transconductance amplifier for production testing of the final design. The devices are offered in a 20-pin, 4mm x 4mm, TQFN-EP package and are fully specified from -40°C to +85°C.
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Data Sheet
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An evaluation kit is available: MAX5977AEVKIT
Key Features
- 1% Accurate Current-Sense Amplifier Output
- Hot-Swap Monitors Operation from 1V to 16V
- Integrated Charge Pump Fully Enhances the External n-Channel FET (VGATE = VIN + 5V)
- VariableSpeed/BiLevel™ Fault Protection Provides Electronic Circuit-Breaker Function
- Output Latched Off After Fault Condition (MAX5977A)
- Autoretry After Fault Condition (MAX5977B)
- Power-Good Indicator
- Calibration Mode
- Small, 20-Pin, 4mm x 4mm, TQFN-EP Package
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Applications/Uses
- General Hot-Swap
- Network Switches and Routers
- Servers
- Storage Systems
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Key Specifications:
| Hot Swap Controllers |
| Part Number |
VIN
(V) |
VIN
(V) |
Circuit Breaker/ Current Limit |
Circuit Breaker/Current Limit Threshold
(mV) |
Fault Condition Control |
Channels |
Positive/Negative Rail |
Package/Pins |
| min |
max |
| MAX5977 |
1 |
16 |
Circuit Breaker |
Adjustable |
| Latched Off | | Periodic Retry |
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1 |
Positive |
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See All Hot Swap Controllers (53)
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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
Application Notes
Product Guides
Reliability Reports
| 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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| MAX5977AETP+
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Active |
TQFN;20 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0037 (PDF)
Use pkgcode/variation: T2044+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5977AETP+T
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Active |
TQFN;20 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0037 (PDF)
Use pkgcode/variation: T2044+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5977BETP+
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Active |
TQFN;20 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0037 (PDF)
Use pkgcode/variation: T2044+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5977BETP+T
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Active |
QFN;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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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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Information Index
Document Ref.: 19-5553
Rev 2;
2011-08-09
This page last modified: 2011-08-09
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