Texas Instruments PT6305A, PT6305B, PT6305C, PT6305CT, PT6305G Datasheet
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For assistance or to order, call (800) 531-5782
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902
Standard Application
C1= Optional electrolytic (100µF)
C
2
= Required 100µF electrolytic (No tantalum)
See capacitor application note on page 43.
3 AMP HIGH-PERFORMANCE
ADJUSTABLE ISR
PT6305 Series
Specifications
Characteristics
PT6305 SERIES
(TA=25˚C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
o
4.5 ≤ V
in
≤ VinMAX 0.3 — 3.0** ADC
Current Limit I
cl
Vin= +5V — 3.6 5.0 ADC
Short Circuit Current I
sc
Vin= +5V — 5.0 — Apk
Input Voltage Range V
in
0.3A ≤ Io≤ 3.0A PT6305N 4.5 — 9 VDC
PT6306N 4.5 — 9 VDC
PT6307N 4.5 — 9 VDC
PT6308N 4.5 — 6.0 VDC
Static Voltage Tolerance V
o
Vin= +5V, Io= 3.0A PT6305N 3.2 3.3 3.4 VDC
0°C ≤ Ta ≤ +70°C PT6306N 1.7 1.8 1.9 VDC
PT6307N 2.0 2.1 2.2 VDC
PT6308N 1.1 1.2 1.3 VDC
Line Regulation Reg
line
4.5V ≤ Vin≤ 5.5V, Io= 3.0A — ±25 ±50 mV
Load Regulation Reg
load
Vin= +5V, 0.3 ≤ Io≤ 3.0A — ±25 ±50 mV
V
o
Ripple/Noise pk-pk V
n
Vin= 5V, Io= 3.0A — 66 — mV
Transient Response t
tr
Iostep between 1.5A and 3.0A — 200 — µSec
with C2= 100µF V
os
Voover/undershoot — 200 — mV
Efficiency
η V
in
= +5V, Io= 1.5A PT6305N — 85 — %
PT6306N — 74 — %
PT6307N — 77 — %
PT6308N — 63 — %
V
in
= +5V, Io= 3.0A PT6305N — 80 — %
PT6306N — 68 — %
PT6307N — 72 — %
PT6308N — 57 — %
Switching Frequency ƒ
o
4.5 ≤ V
in
≤ VinMAX
500 650 800 KHz
0.3A ≤ Io≤ 3.0A
Operating Temperature T
a
Free Air Convection (40-60 LFM)
0 — +70* °C
Over V
in and Io
Ranges
Thermal Resistance θ
ja
Free Air Convection (40-60 LFM) — 25 — °C/W
Storage Temperature T
s
— -40 — +125 °C
Mechanical Shock Per Mil-STD-883D, Method 2002.3 Condition A, 1 msec, Half Sine,
— — 500 G’s
mounted to a fixture
Mechanical Vibration Per Mil-STD-883D, Method 2007.2 Condition A, 20-2000 Hz — — 15 G’s
Weight — — — 11.2 — grams
Relative Humidity — Non-condensing 0 — 95 %
*See Thermal Derating chart. **The PT6305 Series can be easily paralleled to provide output current in multiples of 3 amps. Please contact a Power Trends’ Application Engineer for the
appropriate application note.
Note:
The PT6305 Series requires a 100µF electrolytic capacitor for proper operation in all applications.
VIN
(+)
COM
PT6305,6,7,8
5,6,7,8
9,10,11
COM
V
OUT
(+)
C1
C2
VO Adjust
2,3,4
12
Ordering Information
PT6305n= +3.3 Volts
PT6306
n
= +1.8 Volts
PT6307
n
= +2.1 Volts
PT6308
n
= +1.2 Volts
(For dimensions, see page 66.)
Pin-Out Information
Pin No. Function
1 N/C
2 V
in
3 V
in
4 V
in
5 GND
6 GND
Pin No. Function
7 GND
8 GND
9 V
out
10 V
out
11 V
out
12 Adjust
(See page 40.)
• Single-Device 5V to 3V Power
• 85% Efficiency
• Small SIP Footprint:
0.36" x 2.00” x 0.60"(H)
• Wide Input Voltage Range:
+4.5V to +9.0V
• Internal Short Circuit Protection
• Over-Temperature Protection
The PT6305N is Power Trends’
new high performance +5V to +3.3V, 3
Amp, 12-Pin SIP (Single In-linePackage) Integrated Switching
Regulator (ISR). This high-performance ISR allows easy integration of
low-power 3.3V logic IC’s into existing
5V systems without redesigning the
central power supply. Only one external
capacitor is required for proper
operation. The PT6306,7,8 can be used
to power high-speed data buses (+2.1V),
or the new GTL (+1.2V) logic buses.
PT Series Suffix
(PT1234X)
Case/Pin Heat Tab Configuration
Configuration None Side
Vertical Through-Hole
NR
Horizontal Through-Hole
AG
Horizontal Surface Mount
CB
(See Thermal Application Notes on page 44 for heat tab
application data.)
121
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902
For assistance or to order, call (800) 531-5782
25
DATA SHEETS
High-Performance ISRs
PT6305, 3.3 VDC
(See Note 1)
PT6307, 2.1 VDC
(See Note 1)
PT6308, 1.2 VDC
(See Note 1)
Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Output Current
Ripple vs Output Current Ripple vs Output Current Ripple vs Output Current
Minimum Input Voltage
(See Note 2) Minimum Input Voltage (See Note 2) Minimum Input Voltage (See Note 2)
Thermal Derating (Ta) (See Note 3) Thermal Derating (Ta) (See Note 3)
Power Dissipation vs Output Current Power Dissipation vs Output Current Power Dissipation vs Output Current
Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: Minimum V
in
data is typical and is not guaranteed. The data corresponds to a 2% output voltage drop.
Note 3: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM with no optional heat tab soldered in a printed circuit board. (See Thermal Application Notes).
Iout-(Amps)
Vin-(Volts)
3.5
3.75
4
4.25
4.5
0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
Vin-(Volts)
3.5
3.75
4
4.25
4.5
0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
3.5
3.7
3.9
4.1
4.3
4.5
0 0.5 1 1.5 2 2.5 3
Vin-(Volts)
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
4.5 5 5.5 6
85°C
90°C
Vin-(Volts)
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
4.5 6.5 8.5 10.5
85°C
90°C
95°C
Vin-(Volts)
0
0.5
1
1.5
2
2.5
3
4.5 6.5 8.5 10.5
70°C
85°C
90°C
95°C
Iout-(Amps)
Pd-(Watts)
0
0.5
1
1.5
2
2.5
3
0 0.5 1 1.5 2 2.5 3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
0 0.5 1 1.5 2 2.5 3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Efficiency - %
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
4.5V
5.0V
5.5V
8.0V
9.0V
Vin
Iout-(Amps)
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
4.5V
5.0V
5.5V
8.0V
9.0V
Vin
Iout-(Amps)
Ripple-(mV)
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Efficiency - %
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
4.5V
5.0V
5.5V
6.0V
Vin
Iout-(Amps)
Ripple (mv)
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3
6.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Pd-(Watts)
0
0.5
1
1.5
2
2.5
3
0 0.5 1 1.5 2 2.5 3
6.0V
5.5V
5.0V
4.5V
Vin
Vin-(Volts)
Iout-(Amps)Pd-(Watts)
Efficiency - %
Ripple-(mV)
CHARACTERISTIC DATA
Thermal Derating (Ta) (See Note 3)
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