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MAX5948A, MAX5948B
-48V Hot-Swap Controllers with External RSENSE
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Status
Active: In Production.
Description
The MAX5948A/MAX5948B are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane. The MAX5948A/MAX5948B operate from -20V to -80V and are well-suited for -48V power systems. The MAX5948A is pin- and function-compatible with both the LT1640AL and LT1640L. The MAX5948B is pin- and function-compatible with both the LT1640AH and LT1640H.
The MAX5948A/MAX5948B provide a controlled turn-on to circuit cards preventing glitches on the power-supply rail and damage to board connectors and components. The MAX5948A/MAX5948B provide undervoltage, overvoltage, and overcurrent protection. These devices ensure the input voltage is stable and within tolerance before applying power to the load.
Both the MAX5948A and MAX5948B protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition.
Both devices feature an open-drain power-good status output, active-low PWRGD for MAX5948A or PWRGD for MAX5948B, that can be used to enable downstream converters.
The MAX5948A/MAX5948B are available in an 8-pin SO package. Both devices are specified for the extended -40°C to +85°C temperature range.
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Data Sheet
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Key Features
- Allow Safe Board Insertion and Removal from a Live -48V Backplane
- Pin- and Function-Compatible with LT1640AL/LT1640L (MAX5948A)
- Pin- and Function-Compatible with LT1640AH/LT1640H (MAX5948B)
- Withstand -100V Input Transients with No External Components
- Operate from -20V to -80V
- Programmable Inrush and Short-Circuit Current Limits
- Programmable Overvoltage Protection
- Programmable Undervoltage Lockout
- Power Up into a Shorted Load
- Power-Good Control Output
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Applications/Uses
- Base-Station Line Cards
- Central-Office Switching
- Network Routers and Switches
- Server Line Cards
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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 |
| MAX5948 |
-20 |
-80 |
Current Limit |
50 |
Latched Off |
1 |
Negative |
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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
Block Diagram
Reliability Reports
| Reliability Report: |
MAX5948B.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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| MAX5948AESA
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5948AESA+
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5948AESA+T
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5948AESA-T
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5948BESA
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5948BESA+
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Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5948BESA+T
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Active |
N.SO;8 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX5948BESA-T
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Active |
N.SO;8 pin
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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Similar Products by Function
| MAX5920 |
-48V Hot-Swap Controller with External RSENSE |
| MAX5921, MAX5939 |
-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Current |
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Information Index
Document Ref.: 19-3473
Rev 1;
2011-08-10
This page last modified: 2011-08-10
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