Motorola LM2935TH Datasheet
Order this document by LM2935/D
SEMICONDUCTOR
TECHNICAL DATA
LOW DROPOUT
DUAL VOLTAGE REGULATOR
1
5
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
T SUFFIX
PLASTIC PACKAGE
CASE 314D
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
Heatsink surface connected to Pin 3.
5
1
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
Pin 1. Input Voltage/V
CC
2. Main Output
3. Ground
4. Switch/Reset
5. Standby/Output
Heatsink surface (shown as terminal 6
in case outline drawing) is connected to Pin 3.
5
1
5
1
1
MOTOROLA ANALOG IC DEVICE DATA
The LM2935 is a dual positive 5.0 V low dropout voltage regulator,
designed for standby power systems. The main output is capable of
supplying 750 mA for microprocessor power, and can be turned “on” and
“off” by the switch/reset input. The other output is dedicated for standby
operation of volatile memory , and is capable of supplying up to 10 mA loads.
The total device features a low quiescent current of 3.0 mA or less when
supplying 10 mA from the standby output.
This part was designed for harsh automotive environments and is
therefore immune to many input supply voltage problems such as reverse
battery (–12 V), double battery (+24 V), and load dump transients (+60 V).
• Two Regulated 5.0 V Outputs
• Main Output Current in Excess of 750 mA
• On/Off Control of Main Output
• Standby Output Current in Excess of 10 mA
• Low Input/Output Differential of Less than 0.6 V at 500 mA
• Short Circuit Current Limiting
• Internal Thermal Shutdown
• Low Voltage Indicator Output
• Designed for Automotive Environment Including
• Reverse Battery Protection
• Double Battery Protection
• Load Dump Protection
• Reverse Transient Protection
• Economical 5–Lead TO–220 Package with Two Optional Leadforms
• Also Available in Surface Mount D
2
PAK Package
ORDERING INFORMATION
Device
Tested Operating
Temperature Range
Package
LM2935D2T
Surface Mount
LM2935T
Plastic Power
LM2935TH
TJ = –40° to +125°C
Horizontal Mount
LM2935TV Vertical Mount
Motorola, Inc. 1995 Rev 1
LM2935
2
MOTOROLA ANALOG IC DEVICE DATA
*The main output
is “Off” with switch
S1 open.
An input bypass capacitor is recommended if the regulator is located more than 4
″
from the supply
input filter. The LM2935 is not internally compensated and thus requires an external output capacitor
for stability. A minimum capacitance of 10
µ
F is recommended. The actual capacitance value is
dependent upon load current, temperature, and the capacitor’s equivalent series resistance (ESR).
The least stable condition is encountered at maximum load current and minimum ambient
temperature.
V
in
S1*
0.1
Input
Switch
/Reset
Gnd
3
1
4
Standby
Main
Output
2
20 k
LM2935
5.0 V/750 mA
+
10
Typical Application Circuit
This device contains 29 active transistors.
5
5.0 V/10 mA
+
10
MAXIMUM RATINGS
Rating Symbol Value Unit
Input Voltage Continuous V
I
60 Vdc
Transient Reverse Polarity Input Voltage
1.0% Duty Cycle, τ ≤ 100 ms
–VI(τ) –50 Vpk
Switch/Reset Input Current I
in
5.0 mA
Power Dissipation
Case 314A, 314B and 314D (TO–220 Type)
TA = 25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient R
θJA
65 °C/W
Thermal Resistance, Junction–to–Case R
θJC
5.0 °C/W
Case 936A (D2PAK)
TA = 25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient R
θJA
Per Figure 1 °C/W
Thermal Resistance, Junction–to–Case R
θJC
5.0 °C/W
Operating Junction Temperature Range T
J
–40 to +150 °C
Storage Temperature Range T
stg
–65 to +150 °C
LM2935
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (V
in
= 14 V, IO = 500 mA, I
stby
= 0 mA, CO = 10 µF, C
stby
= 10 µF, TJ = 25°C [Note 1].)
Characteristic
Symbol Min Typ Max Unit
MAIN OUTPUT
Output Voltage (Vin = 6.0 V to 26 V, IO = 5.0 mA to 500 mA, TJ = –40 to +125°C)
V
O
4.75 5.0 5.25 V
Line Regulation
Vin = 9.0 V to 16 V, IO = 5.0 mA
Vin = 6.0 V to 26 V, IO = 5.0 mA
Reg
line
–
–
4.0
10
25
50
mV
Load Regulation (IO = 5.0 mA to 500 mA) Reg
load
– 10 50 mV
Output Impedance
IO = 500 mAdc and 10 mArms, f = 100 Hz to 10 kHz
Z
O
– 200 –
mΩ
Output Noise Voltage (f = 10 Hz to 100 kHz) V
n
– 100 – µVrms
Long Term Stability S – 20 – mV/kHR
Ripple Rejection (f = 120 Hz) RR – 66 – dB
Dropout Voltage
IO = 500 mA
IO = 750 mA
VI–V
O
–
–
0.45
0.82
0.6
–
V
Short Circuit Current Limit I
SC
0.75 1.2 – A
Over–Voltage Shutdown Threshold V
th(OV)
26 31 – V
SWITCH/RESET
Output Sink Current (VOL = 1.2 V)
I
Sink
– 5.0 – mA
Output Voltage (R
on/off
= 20 kΩ)
Low State, Vin = 4.0 V
High State, Vin = 14 V
V
OL
V
OH
–
4.5
0.9
5.0
1.2
6.0
V
Output Pull–Up Resistor, “On”/“Off” (Note 2) R
on/off
– 20 30 kΩ
Output Voltage with Reverse Polarity Input (Vin = –15 V, RL = 10 Ω) –V
O
–0.6 0 – V
ELECTRICAL CHARACTERISTICS (V
in
= 14 V, IO = 0 mA, I
stby
= 10 mA, CO = 10 µF, C
stby
= 10 µF, TJ = 25°C [Note 1].)
Characteristic
Symbol Min Typ Max Unit
STANDBY OUTPUT
Output Voltage (Vin = 6.0 V to 26 V, I
stby
= 1.0 mA to 10 mA, TJ = –40 to +125°C)
V
O(stby)
4.75 5.0 5.25 V
Tracking Voltage VO–V
O(stby)
–200 0 200 mV
Line Regulation (Vin = 6.0 V to 26 V) Reg
line
– 4.0 50 mV
Load Regulation (I
stby
= 1.0 mA to 10 mA) Reg
load
– 10 50 mV
Output Impedance
I
(stby)
= 10 mAdc and 1.0 mArms, f = 100 Hz to 10 kHz
Z
O(stby)
– 1.0 –
Ω
Output Noise Voltage (f = 10 Hz to 100 kHz) V
n
– 300 – µVrms
Long Term Stability S – 20 – mV/kHR
Ripple Rejection (f = 120 Hz) RR – 66 – dB
Dropout Voltage (I
stby
= 10 mA) VI–V
O(stby)
– 0.55 0.7 V
Short Circuit Current Limit I
SC
25 70 – mA
Output Voltage with Reverse Polarity Input
Vin = –15 V, RL = 510 Ω
–V
O
–0.3 0 –
V
Output Voltage with Maximum Positive Input
Vin = 60 V, RL = 510 Ω
V
O(max)
– 5.0 6.0
V
TOTAL DEVICE
Bias Current
IO = 10 mA, I
stby
= 0 mA
IO = 500 mA, I
stby
= 0 mA
IO = 750 mA, I
stby
= 0 mA
Main Output “Off”, I
stby
= 10 mA
I
B
–
–
–
–
3.0
40
90
2.0
–
100
–
3.0
mA
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. The maximum switch/reset current must not exceed 5.0 mA.
Loading...