UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
(X) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
Phipps, Charles H.
c/o Sevin Rosen Fund III L.P.
Two Galleria Tower
13455 Noel Road, Suite 1670, LB5
Dallas, TX 75240
2. Issuer Name and Ticker or Trading Symbol
Benchmarq Microelectronics, Inc.
("BMRQ")
3. IRS or Social Security Number of Reporting Person (Voluntary)
4. Statement for Month/Year
08/03/1998
5. If Amendment, Date of Original (Month/Year)
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
(X) Director ( ) 10% Owner ( ) Officer (give title below) ( ) Other
(specify below)
7. Individual or Joint/Group Filing (Check Applicable Line)
(X) Form filed by One Reporting Person
( ) Form filed by More than One Reporting Person
<TABLE>
<CAPTION>
___________________________________________________________________________________________________________________________________
Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned |
___________________________________________________________________________________________________________________________________|
1. Title of Security |2. |3. |4.Securities Acquired (A) |5.Amount of |6.Dir |7.Nature of Indirect |
| Transaction | or Disposed of (D) | Securities |ect | Beneficial Ownership |
| | | | Beneficially |(D)or | |
| | | | | A/| | Owned at |Indir | |
| Date |Code|V| Amount | D | Price | End of Month |ect(I)| |
___________________________________________________________________________________________________________________________________|
<S> <C> <C> <C><C> <C> <C> <C> <C> <C>
Common Stock |08/03/|J(1)| |40,422 |D |(1) | -0 - |D | |
|98 | | | | | | | | |
- -----------------------------------------------------------------------------------------------------------------------------------|
Common Stock |08/03/|J(2)| |1,125 |D |(2) |-0- |I |by Trustee(3) |
|98 | | | | | | | | |
- -----------------------------------------------------------------------------------------------------------------------------------|
___________________________________________________________________________________________________________________________________|
<CAPTION>
___________________________________________________________________________________________________________________________________
Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned |
___________________________________________________________________________________________________________________________________|
1.Title of Derivative |2.Con- |3. |4. |5.Number of De |6.Date Exer|7.Title and Amount |8.Price|9.Number |10.|11.Nature of|
Security |version |Transaction | rivative Secu |cisable and| of Underlying |of Deri|of Deriva |Dir|Indirect |
|or Exer | | | rities Acqui |Expiration | Securities |vative |tive |ect|Beneficial |
|cise | | | red(A) or Dis |Date(Month/| |Secu |Securities |(D)|Ownership |
|Price of| | | posed of(D) |Day/Year) | |rity |Benefi |or | |
|Deriva- | | | |Date |Expir| | |ficially |Ind| |
|tive | | | | A/|Exer-|ation| Title and Number | |Owned at |ire| |
|Secu- | | | | | D |cisa-|Date | of Shares | |End of |ct | |
|rity |Date |Code|V| Amount | |ble | | | |Month |(I)| |
___________________________________________________________________________________________________________________________________|
<S> <C> <C> <C> <C><C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
| | | | | | | | | | | | | | |
___________________________________________________________________________________________________________________________________|
</TABLE>
Explanation of Responses:
(1) Exchanged for 40,422 shares of common stock (the "Unitrode Common Stock")
of Unitrode Corporation pursuant
to a merger (the "Merger") of a wholly-owned subsidiary of Unitrode Corporation
with and into Benchmarq
Microelectronics, Inc.
(2) Exchanged for 1,125 shares of Unitrode Common Stock pursuant to the
Merger.
(3) The shares were held in a trust for the benefit of the Reporting Person's
child. The Reporting Person's wife is
the
Trustee.
SIGNATURE OF REPORTING PERSON
/s/ John V. Jaggers, Attorney-in-Fact
DATE
August 28, 1998
