|
|
|
MAX5092, MAX5093
4V to 72V Input LDOs with Boost Preregulator
Automotive LDOs with Boost Preregulators Operate Seamlessly from 4V Cold Crank to 72V Load Dump
|
Status
Active: In Production.
Description
The MAX5092A/MAX5092B/MAX5093A/MAX5093B low-quiescent-current, low-dropout (LDO) regulators contain simple boost preregulators operating at a high frequency. The devices seamlessly provide a preset 3.3V (MAX5092A/MAX5093A) or 5V (MAX5092B/MAX5093B) LDO output voltage from an automotive cold-crank through load-dump (3.5V to 80V) input voltage conditions. The MAX5092_/MAX5093_ deliver up to 250mA with excellent load and line regulation. During normal operation, when the battery is healthy, the boost preregulator is completely turned off, reducing quiescent current to 65µA (typ). This makes the devices suitable for always-on power supplies.
The buck-boost operation achieved by this combination of LDO and boost preregulator offers the advantage of using a single off-the-shelf inductor in place of the multiple- winding custom magnetics needed in typical single- ended primary inductor converter (SEPIC) and transformer-based flyback topologies. The high operating frequency of the boost regulator significantly reduces component size. The MAX5092_ integrates a blocking diode to further reduce the external component count. The boost preregulator output voltage is preset to 7V. Both LDO and boost output voltages are programmable using external resistors. The boost preregulator output voltage is adjustable up to 11V (MAX5092_), or up to 12V (MAX5093_). The LDO output voltage is adjustable from 1.5V to 9V (MAX5092_) or from 1.5V to 10V (MAX5093_).
The devices feature a shutdown mode with 5µA (typ) shutdown current, a active-low HOLD input to implement a self-holding circuit, and a power-on-reset output (active-low RESET) with an externally programmable timeout period. Additional features include output overload, short-circuit, and thermal protection.
The MAX5092_/MAX5093_ are available in a thermally enhanced, 16-pin 5mm x 5mm thin QFN package and can dissipate up to 2.7W at +70°C on a multilayer PC board.
|
|
Data Sheet
|
An evaluation kit is available: MAX5092EVKIT
Key Features
- Wide Operating Input Voltage Range: 3.5V to 72V with a 4V Startup Voltage
- LDO Output Regulates to 5V Seamlessly from an Input Voltage of 3.5V to 72V
- Up to 250mA Output Current
- Preset 3.3V, 5V, or Externally Programmable LDO Output Voltage from 1.5V to 9V (MAX5092_) or from 1.5V to 10V (MAX5093_)
- Preset 7V or Externally Programmable Boost Output Voltage Up to 11V (MAX5092_) or Up to 12V (MAX5093_)
- 65µA Quiescent Current in LDO Mode (VIN ≥ 8V)
- 5µA Shutdown Current
- Power-On Reset (Active-Low RESET) with Programmable Timeout Period
- Output Short-Circuit and Thermal Protection
- TQFN Package Capable of Dissipating up to 2.7W at +70°C
|
|
Applications/Uses
- Automotive: Body Electronics
- Automotive: ECU
- Industrial
|
|
|
|
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) |
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 |
nom |
max w/pins |
See Notes |
| MAX5092 |
1 |
3.5 |
72 |
|
1.5 |
9 |
0.9 |
250 |
85 |
No |
Vout-10% |
No |
No |
-40 to +125 |
|
26 |
$1.60 @1k |
| MAX5093 |
10 |
|
$1.60 @1k |
|
See All Linear Regulators (146)
|
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.
|
|
| Step-Up/Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Preset VOUT
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
Output Adjust. Method |
DC-DC Outputs |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX5092 |
3.5 |
72 |
1.5 |
9 |
|
0.25 |
0.25 |
|
1 |
|
26 |
$1.60 @1k |
| MAX5093 |
10 |
|
$1.60 @1k |
|
See All Step-Up/Down Switching Regulators (9)
|
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.
|
|
Diagram
 Typical Operating Circuit
Product Guides
Reliability Reports
| Show FIT data for: |
|
| Request Reliability Report for: |
|
Software/Models
Ordering Information
|
Part Number
|
Free
Sample |
Buy |
Status
|
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
|
Temp |
RoHS/Lead-Free?
Materials Analysis
|
| MAX5092AATE+
|
|
|
Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
|
-40°C to +125°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5092AATE+T
|
|
|
Active |
QFN;
Land Pattern: Not Available
|
-40°C to +125°C
|
See data sheet
|
| MAX5092BATE+
|
|
|
Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
|
-40°C to +125°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5092BATE+T
|
|
|
Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
|
-40°C to +125°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5093AATE+
|
|
|
Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
|
-40°C to +125°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5093AATE+T
|
|
|
Active |
QFN;
Land Pattern: Not Available
|
-40°C to +125°C
|
See data sheet
|
| MAX5093BATE+
|
|
|
Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
|
-40°C to +125°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5093BATE+T
|
|
|
Active |
QFN;
Land Pattern: Not Available
|
-40°C to +125°C
|
See data sheet
|
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.
|
Similar Products by Function
| MAX5086 |
45V, 250mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay |
| MAX5023, MAX5024 |
65V, Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer |
| MAX5087 |
45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay |
| MAX5091 |
28V, 100mA, Low-Quiescent-Current LDO with Reset and Power-Fail Input/Output |
| MAX5084, MAX5085 |
65V, 200mA, Low-Quiescent-Current Linear Regulators in TDFN |
|
|
Evaluation Kits
| MAX5092EVKIT |
Evaluation Kit for the MAX5092B, MAX5092A, MAX5093B, MAX5093A |
Products with Similar Part Numbers
| MAX5092EVKIT |
Evaluation Kit for the MAX5092B, MAX5092A, MAX5093B, MAX5093A |
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-0659
Rev 1;
2008-02-08
This page last modified: 2008-02-11
|
|
|
Download
E-Mail