OMNIREL OM7644SM, OM7642SM, OM7643SM Datasheet

3.5 - 139

3.5

Isolated Hermetic Surface Mount Package

1.5 Amp, -5V, -12V, -15V Negative Voltage
Regulators

4 11 R1
Supersedes 1 05 R0

SURFACE MOUNT NEGATIVE VOLTAGE
REGULATOR, 3-TERMINAL, FIXED VOLTAGE

FEATURES

• Small Hermetic Surface Mount Package

• Chip Isolated From Package

• Output Voltages: -5V, -12V, -15V

• Output Voltages Set Internally To ±1%

• Built-In Thermal Overload Protection

• Short Circuit Current Limiting

• Product Is Available Hi-Rel Screened

DESCRIPTION

These three terminal negative regulators are supplied in a hermetically sealed
surface mount package. All protective features are designed into the circuit including
thermal shutdown, current limiting and safe-area control. With heat sinking, they can
deliver over 1.5 amps of output current. These units feature internally trimmed output
voltages to ±1% of nominal output voltage. Standard voltages are -5V, -12V, and

-15V. These units are ideally suited for Military applications where a hermetically
sealed surface mount package is required.

ABSOLUTE MAXIMUM RATINGS

Input to Output Voltage Differential........................................-35V

Operating Junction Temperature Range........................- 55°C to + 150°C

Storage Temperature Range .................................- 55°C to + 150°C

Typical Power/Thermal Characteristics:

Rated Power @ 25°C

TC..........................................................17.5W

TA.............................................................3W

Thermal Resistance:

θ

JC

........................................................4.2°C/W

θ

JA

........................................................42°C/W

Lead Temperature at Case (5 sec).................................225°C

OM7644SMOM7642SM

OM7643SM

3.5 - 140

OM7642SM - OM7644SM

3.5

ELECTRICAL CHARACTERISTICS -5 Volt V

IN

= -10V, Io= 500mA, -55°C ≤ TA≤ 125°C (unless otherwise specified)

Parameter Symbol Test Conditions Min. Max. Unit

Output Voltage V

OUT

TA= 25°C -4.95 -5.05 V

V

IN

= -7.5V to -20V • -4.85 -5.15 V

Line Regulation V

RLINE

VIN= -7.5V to -20V 12 mV

(Note 1)

• 25 mV

V

IN

= -8.0V to -12V 5 mV

• 12 mV

Load Regulation V

RLOAD

IO = 5mA to 1.5 Amp 20 mV

(Note 1)

• 25 mV

I

O

= 250mA to 750 mA 15 mV

• 30 mV

Standby Current Drain I

SCD

2.5 mA

• 3.0 mA

Standby Current Drain ∆I

SCD

VIN= -7.0V to -20V • 0.4 mA

Change With Line (Line)

Standby Current Drain ∆I

SCD

IO= 5mA to 1000mA • 0.4 mA

Change With Load (Load)

Dropout Voltage V

DO

∆V

OUT

= 100mV, I

O

=1.0A • 2.5 V

Peak Output Current I

O (pk)

TA= 25°C 1.5 3.3 A

Short Circuit Current I

DS

VIN= -35V 1.2 A

(Note 2)

• 2.8 A

Ripple Rejection ∆V

IN

f =120 Hz, ∆VIN= -10V 63 dB

∆V

OUT

(Note 3) • 60 dB

Output Noise Voltage N

O

TA= 25°C, f =10 Hz to 100KHz 40 µV/V

(Note 3) RMS

Long Term Stability ∆V

OUT

TA= 25°C, t = 1000 hrs. 75 mV

(Note 3) ∆t

ELECTRICAL CHARACTERISTICS -12 Volt V

IN

= -19V, Io= 500mA, -55°C ≤ TA≤ 125°C (unless otherwise specified)

Parameter Symbol Test Conditions Min. Max. Unit

Output Voltage V

OUT

TA= 25°C -11.88 -12.12 V

V

IN

= -14.5V to -27V • -11.64 -12.36 V

Line Regulation V

RLINE

VIN= -14.5V to -27V 20 mV

(Note 1)

• 50 mV

V

IN

= -16V to -22V 10 mV

• 30 mV

Load Regulation V

RLOAD

IO = 5mA to 1.5 Amp 32 mV

(Note 1)

• 60 mV

I

O

= 250mA to 750 mA 16 mV

• 30 mV

Standby Current Drain I

SCD

3.5 mA

• 4.0 mA

Standby Current Drain ∆I

SCD

VIN= -14.5V to -27V • 0.8 mA

Change With Line (Line)

Standby Current Drain ∆I

SCD

IO= 5mA to 1000mA • 0.5 mA

Change With Load (Load)

Dropout Voltage V

DO

∆V

OUT

= 100mV, I

O

=1.0A • 1.8 V

Peak Output Current I

O (pk)

TA= 25°C, IO= 5mA to 1A 1.5 3.3 A

Short Circuit Current I

DS

V

IN

= -35V 1.2 A

(Note 2)

• 2.8 A

Ripple Rejection ∆V

IN

f =120 Hz, ∆VIN= -10V 56 dB

∆V

OUT

(Note 3) • 53 dB

Output Noise Voltage N

O

TA= 25°C, f =10 Hz to 100KHz 40 µV/V

(Note 3) RMS

Long Term Stability ∆V

OUT

TA= 25°C, t = 1000 hrs. 120 mV

(Note 3) ∆t

Notes:

1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.

2. Short Circuit protection is only assured up to V

IN

= -35V.

3. If not tested, shall be guaranteed to the specified limits.
The • denotes the specifications which apply over the full operating temperature range.