SI-3033ZD Datasheet, PDF (1/2 Pages) Allegro MicroSystems – High-Current, Low-Dropout, 3.3 V Regulator

1-1-4 Linear Regulator ICs
SI-3000ZD Series Surface-Mount, Low Dropout Voltage
■Features
• Compact surface-mount package (TO263-5)
• Output current: 3.0A
• Low dropout voltage: VDIF ≤ 0.6V (at IO = 3.0A)
• Low circuit current at output OFF: Iq (OFF) ≤ 1µA
• Built-in overcurrent and thermal protection
circuits
■Applications
• Secondary stabilized power supply (local
power supply)
■Absolute Maximum Ratings
Parameter
DC Input Voltage
Output Control Terminal Voltage
DC Output Current
Power Dissipation
Junction Temperature
Operating Ambient Temperature
Storage Temperature
Thermal Resistance (Junction to Ambient Air)
Thermal Resistance (Junction to Case)
Symbol
VIN*1
VC
IO*1
PD*3
Tj
Top
Tstg
θ j-a
θ j-c
■Recommended Operating Conditions
Parameter
Input Voltage
Output Current
Operating Ambient Temperature
Operating Junction Temperature
Output Voltage Variable Range
Symbol
Ratings
Unit
VIN
*2 _{to 6}*1
V
IO
0 to 3
A
Top (a)
–20 to +85
°C
Top (j)
–20 to +100
°C
VOADJ
1.2 to 5
V
*1: VIN (max) and IO (max) are restricted by the relation PD = (VIN - VO) × IO.
*2: Set the input voltage to 2.4V or higher when setting the output voltage to 2.0V or lower (SI-3011ZD).
*3: When mounted on glass-epoxy board of 40 × 40mm (copper laminate area 100%).
Ratings
10
6
3.0
3
–30 to +125
–30 to +85
–40 to +125
33.3
3
(Ta=25°C)
Unit
V
V
A
W
°C
°C
°C
°C/W
°C/W
Remarks
Only for SI-3011ZD. Refer to the block diagram.
■Electrical Characteristics
(Ta=25°C, VC=2V, unless otherwise specified)
Ratings
Parameter
Symbol
SI-3011ZD (Variable type)
SI-3033ZD
Unit
min.
typ.
max.
min.
typ.
max.
Output Voltage
(Reference Voltage VADJ for SI-3011ZD)
VO (VADJ)
Conditions
1.078
1.100
VIN=VO+1V, IO=10mA
1.122
3.234
3.300
3.366
V
VIN=5V, IO=10mA
Line Regulation
∆VOLINE
Conditions
10
VIN=3.3 to 5V, IO=10mA (VO=2.5V)
10
mV
VIN=4.5 to 5.5V, IO=10mA
Load Regulation
∆VOLOAD
Conditions
40
VIN=3.3V, IO=0 to 3A (VO=2.5V)
40
mV
VIN=5V, IO=0 to 3A
Dropout Voltage
VDIF
Conditions
0.6
IO=3A (VO=2.5V)
IO=3A
0.6
V
Quiescent Circuit Current
Iq
Conditions
1
1.5
VIN=VO+1V, IO=0A, VC=2V
1
1.5
mA
VIN=5V, IO=0A, VC=2V
Circuit Current at Output OFF
Iq (OFF)
Conditions
1
VIN=VO+1V, VC=0V
1
µA
VIN=5V, VC=0V
Temperature Coefficient
of Output Voltage
∆VO/∆Ta
Conditions
±0.3
Tj=0 to 100°C
±0.3
Tj=0 to 100°C
mV/ °C
Ripple Rejection
RREJ
Conditions
60
VIN=VO+1V, f=100 to 120HZ, IO=0.1A
60
dB
VIN=5V, f=100 to 120HZ, IO=0.1A
Overcurrent Protection Starting Current^*2
IS1
3.2
3.2
A
*4
Conditions
VIN=VO+1V
VIN=5V
Control Voltage (Output ON)^*3
VC, IH
2
Control Voltage (Output OFF)^*3
VC, IL
2
0.8
V
0.8
VC
Control Current(Output ON)
Terminal
IC, IH
Conditions
100
VC=2.7V
100
µA
VC=2.7V
Control Current(Output OFF)
IC, IL
–5
Conditions
0
VC=0V
–5
0
µA
VC=0V
*1: Set the input voltage to 2.4V or higher when setting the output voltage to 2.0V or lower.
*2: IS1 is specified at the –5% drop point of output voltage VO under the condition of Output Voltage parameter.
*3: Output is OFF when the output control terminal (VC terminal) is open. Each input level is equivalent to LS-TTL level. Therefore, the device can be driven directly by LS-TTLs.
*4: These products cannot be used for the following applications because the built-in foldback-type overcurrent protection may cause errors during start-up stage.
(1) Constant current load (2) Positive and negative power supply (3) Series-connected power supply (4) VO adjustment by raising ground voltage
80 ICs