PT78HT205 Datasheet, PDF (1/3 Pages) Texas Instruments – 2 Amp Positive Step-Down Integrated Switching Regulator

PT78HT200 Series
2 Amp Positive Step-Down
Integrated Switching Regulator
SLTS057B
(Revised 10/15/2000)
Standard Application
Vin
C1
COM
1 _PT78HT200 3
Vout
+
2
C2
COM
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic (1)
• High Efficiency: Up to 90%
• Wide Input Range
• Self-Contained Inductor
• Short-Circuit Protection
• Over-Temperature Protection
• Fast Transient Response
The PT78HT200 is a series of fixed
output, wide-input range, 3-terminal
Integrated Switching Regulators (ISRs).
These ISRs have a maximum output
Pin-Out Information
Pin Function
1
V_in
2 GND
3
V_out
current of 2A. The output voltage is
also laser trimmed for high accuracy.
Features include excellent line and
load regulation, internal short-circuit
and over-temperature protection.
The PT78HT200 series is available
in three package outlines, including
horizontal SMD. Their small size and
output voltage selection makes these
regulators ideal for use in a variety
of applications.
Ordering Information
PT78HT2 XX Y
Output Voltage
33 = 3.3 Volts
05 = 5.0 Volts
53 = 5.25 Volts
65 = 6.5 Volts
08 = 8.0 Volts
Package Suffix
V = Vertical Mount
S = Surface Mount
H = Horizontal
Mount
Specifications
Pkg Style 500
Characteristics
(T_a = 25°C unless noted)
Output Current
Short Circuit Current
Input Voltage Range
Symbols
I_o
Isc
Vin
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
(with 100µF output cap)
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
∆V_o
Reg_line
Regload
Vn
t_tr
η
ƒo
Ta
θja
T_s
—
—
—
Conditions
Over V_in range
Vin = Vin min
0.1 ≥ Io ≥ 2.0A
Over V_in range, I_o = 2.0A
Ta = 0°C to +60°C
Over V_in range
0.1 ≤ Io ≤ 2.0A
Vin = Vin min, Io = 2.0A
50% load change
Vo over/undershoot
V_in=9V, I_o = 2.0A
Vin =12V, Io =2.0A
Vin =15V, Io =2.0A
Over Vin and Io ranges
Over Vin range
Vo =3.3V
Vo =5.0V
V_o =6.5V
Vo =8.0V
V_o =3.3V
Vo =5.0V
Vo =8.0V
Vo ≥5.0V
Vo =3.3V
Free Air Convection, (40-60LFM)
—
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
PT78HT200 SERIES
Min
Typ
Max
0.1 (2)
—
2.0
—
6.0
—
9
—
15
9
—
28
10.5
—
28
12
—
28
—
±1.0
±2.0
—
±0.4
±0.8
—
±0.2
±0.4
—
±1
—
—
100
—
5.0
—
80
—
—
85
—
—
90
—
700
750
800
950
1,000
1,050
-40
—
+85 ⁽³⁾
—
40
—
-40
—
+125
—
500
—
—
5
—
—
6.5
—
Notes: (1) The PT78HT200 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
(2) ISR will operate down to no load with reduced specifications.
(3) See Safe Operating Area curves for derating
Units
A
Apk
V
%Vo
%Vo
%Vo
%Vo
µSec
%Vo
%
kHz
°C
°C/W
°C
G’s
G’s
Grams
For technical support and more information, see inside back cover or visit www.ti.com/powertrends