ST1845

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Design Win

Rad-tolerant current mode PWM controller

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Product overview

Description

The ST1843 and ST1845 ICs are rad-hard current mode PWM controllers providing an industry standard solution for the implementation of off-line or DC to DC fixed-frequency current mode control schemes with a minimal external part count.

Its radiation hardness, hermetic packaging and its ESCC qualification make it an ideal choice for aerospace and other harsh environments.

  • All features

    • Oscillator frequency guaranteed at 250 kHz
    • Trimmed oscillator for precise frequency control
    • Current mode operation to 500 kHz automatic feed forward compensation
    • Latching PWM for cycle-by-cycle current limiting
    • Internally trimmed reference with undervoltage lockout
    • High current totem pole output
    • Undervoltage lockout with hysteresis
    • Low start-up (<0.5 mA) and operating current
    • Ceramic hermetic package Flat-8 metallic lid floating
    • ST1843 50 krad (Si)
    • ST1845 100 krad (Si)
    • SEL free @ 120 MeV/cm2/mg at 125 °C
    • ESCC qualified as 9108/020 and 9108/021

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST1845

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Symbols

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Footprints

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3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1845K1
Active
Flat-8 Industrial N/A
ST1845RKG
Active
Flat-8 Industrial N/A
ST1845RKT
Active
Flat-8 Industrial N/A

ST1845K1

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

Grade

Industrial

RoHS Compliance Grade

N/A

ST1845RKG

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

Grade

Industrial

RoHS Compliance Grade

N/A

ST1845RKT

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

Grade

Industrial

RoHS Compliance Grade

N/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

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Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Package
Packing Type
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
Package: Product Marking
SMD PIN/Detailed Spec
Quality Level
Lead Finish
ST1845K1
Available at distributors

Distributor availability of ST1845K1

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

ST1845RKG
Available at distributors

Distributor availability of ST1845RKG

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

ST1845RKT
Available at distributors

Distributor availability of ST1845RKT

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

ST1845K1 Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

ST1845K1

Package: Product Marking:

ST1845K1

SMD PIN/Detailed Spec:

-

Quality Level:

Engineering Model

Lead Finish:

Gold

ST1845RKG Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

ST1845RKG

Package: Product Marking:

9108/021/01R

SMD PIN/Detailed Spec:

9108/021/01R

Quality Level:

ESCC Flight

Lead Finish:

Gold

ST1845RKT Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

ST1845RKT

Package: Product Marking:

9108/021/02R

SMD PIN/Detailed Spec:

9108/021/02R

Quality Level:

ESCC Flight

Lead Finish:

Solder dip

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors