PT6121 Datasheet, PDF (1/7 Pages) Texas Instruments – 1 AMP ADJUSTABLE LOW VOLTAGE INPUT INTEGRATED SWITCHING REGULATOR

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PT6120
Series
1 AMP ADJUSTABLE LOW VOLTAGE INPUT
INTEGRATED SWITCHING REGULATOR
SLTS081
(Revised 6/4/98)
• Low Voltage Input (7V)
• 89% Efficiency
• Adjustable Output Voltage
• Internal Short Circuit Protection
• Over-Temperature Protection
• On/Off Control (Ground Off)
The PT6120 series is a low volt-
age input (typically 7V) version of
Power Trends’ high-performance
1A, 12 pin SIP Integrated Switching
Regulators (ISRs). These ISRs are de-
signed with premium low threshold FETs
for those applications requiring very low
input/output voltage differentials such as
battery powered equipment. This high-
performance ISR family offers a unique
combination of features combining 89%
typical efficiency with open-collector on/
off control and adjustable output voltage.
Quiescent current in the shutdown mode
is less than 100µA.
Standard Application
V_OADJ
12
V_IN
2,3,4
PT6120
9,10,11
V_OUT
1
C1
INH
GND
5,6,7,8
+
C2
Q1
GND
C₁ = Optional 1µF ceramic
Q₁ = NFET
C₂ = Required 100µF electrolytic
Specifications
Pin-Out Information
Pin Function
1
Inhibit
(30V max)
2
Vin
3
Vin
4
Vin
5 GND
6 GND
7 GND
8 GND
9
Vout
10
Vout
11
Vout
12
Vout Adj
Ordering Information
PT6121! = +5 Volts
PT6122! = +3.3 Volts
Pkg Style 200
PT6120
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole A
Horizontal Surface Mount C
Characteristics
(T_a =25°C unless noted)
Symbols
Output Current
Io
Short Circuit Current
I_sc
Input Voltage Range
V_in
(Note: inhibit function cannot be used with Vin above 30V)
Output Voltage Tolerance
∆Vo
Line Regulation
Load Regulation
V_o Ripple/Noise
Transient Response
with C_o = 100µF
Efficiency
Regline
Regload
V_n
t_tr
V_os
η
Switching Frequency
ƒ_o
Shutdown Current
I_sc
Quiescent Current
I_nl
Output Voltage
Vo
Adjustment Range
Absolute Maximum
T_a
Operating Temperature Range
Conditions
Over Vin range
Vin = Vin min
0.1 ≤ I_o ≤ 1.0 A
V_o = 3.3V
Vo = 5V
Over Vin Range, Io = 1.0 A
T_a = 0°C to +60°C
Over Vin range
0.1 ≤ Io ≤ 1.0 A
V_in=V_in min, I_o=1.0 A
50% load change
V_o over/undershoot
Vin=9V, Io=0.5A, Vo=3.3V
V_in=9V, I_o=0.5A, V_o=5V
Over Vin and Io ranges
Vin = 15V
Io = 0A, Vin =10V
Below Vo
Above Vo
PT6120 SERIES
Min
Typ
0.1*
—
—
3.5
7
—
7
—
—
±1.0
Max
1.0
—
26
30/38**
±2.0
—
±0.25
±0.5
—
±0.25
±0.5
—
±2
—
—
100
200
—
5.0
—
—
84
—
—
89
—
400
500
600
—
100
—
—
10
—
See Application Notes.
Units
A
Apk
V
V
%Vo
%Vo
%Vo
%V_o
µSec
%V_o
%
%
kHz
µA
mA
-40
—
+85
°C
Recommended Operating
T_a
Temperature Range
Thermal Resistance
θ_ja
Free Air Convection,
(40-60LFM)
Free Air Convection
(40-60LFM)
Vo= 3.3V
Vo= 5V
Vo = 3.3V
Vo = 5V
-40
—
-40
—
—
50
—
40
Storage Temperature
T_s
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
-40
—
—
500
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2
20-2000 Hz, Soldered in a PC board
—
10
Weight
—
5.0
* ISR will operate down to no load with reduced specifications.
** Input voltage cannot exceed 30V when the inhibit function is used. ***See Thermal Derating chart.
Note: The PT6120 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
+85***
+85***
—
—
+125
—
—
—
°C
°C/W
°C
G’s
G’s
grams
4
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.ti.com/powertrends