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参数资料
| 型号： | PT6905A |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, SMA23 |
| 封装： | SIP-23 |
| 文件页数： | 1/7页 |
| 文件大小： | 145K |
| 代理商： | PT6905A |
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6900 Series
Standard Application
Ordering Information
+5V Input
+3.3V Input
Vout
PT6901
J
J PT6904K
K
K = –2.0V
PT6902
J
J PT6905K
K
K = –5.2V
PT6903
K
= –1.5V
Cin = Required 330F electrolytic
Cout = Required 330F electrolytic
+5V/+3.3V Input Voltage
Negative Output
Remote Sense
Adjustable Output Voltage
23-pin SIP Package
The PT6900 is a series of high-
performance ISRs, that provide plus to
minus voltage conversion, up to 12 watt
in a 23-pin SIP package.
Pin Function
1
Do not connect
2Vout Adjust
3Vin
4Vin
5Vin
6Vin
7Vin
8
Remote Sense GND
9
GND
10
GND
11
GND
12
GND
Pin
Function
13
GND
14
GND
15
GND
16
Vout
17
Vout
18
Vout
19
Vout
20
Vout
21
Vout
22
Remote Sense Vout
23
Do not connect
Pin-Out Information
The PT6900 is designed to supply
regulated negative voltages for power-
ing the latest ECL (-5.2V) and GaAs
(-2.0V) ICs used in high-speed fiber
optic communications. A 330F elec-
trolytic capacitor is required on the
input and output for proper operation.
Please note that this product is not
short-circuit protected.
(For dimensions and PC board layout,
see Package Styles 1100 and 1110.)
Cout
Cin
PT6900
16-21
9-15
3-7
2
V
ADJ
-V
OUT
GND
+V
IN
+
22
Remote Sense
8
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
SLTS041A
(Revised 6/30/2000)
Specifications
Characteristics
PT6900 SERIES
(T
a= 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = +25°C, natural convection
Vin =5.0V
Vo = –2.0V / –1.5V
0.1 (1)
—6.0 (2)
A
Vo = –5.2V
0.1 (1)
—3.5 (2)
Vin =3.3V
Vo = –2.0V
0.1 (1)
—5.0 (2)
A
Vo = –5.2V
0.1 (1)
—2.5 (2)
Input Voltage Range
0.1A
≤ Io ≤ Imax
PT6901 PT6902/PT6903
4.5
—
5.5
PT6904/PT6905
3.1
—
3.6
V
Output Voltage Tolerance
Vo
Nominal Vin, Io = Imax
Vo – 0.05
—
Vo+ 0.05
V
0°C
≤ Ta ≤ +60°C
Output Adjust Range
Vo
Pin 14 to Vo or GND
Vo = –2.0V
–1.4
—
–4.4
Vo = –5.2V
–2.7
—
–6.5
V
Vo = –1.5V
–1.2
—
–3.4
Line Regulation
Regline
Over Vin range, Io =Imax
—
±0.5
±1.0
%
Load Regulation
Regload
Vin =Vnom, 0.1 ≤ Io ≤ Imax
—
±0.5
±1.0
%
Vo Ripple/Noise
Vn
Vin = Vnom, Io =Imax
Vo = –1.5V / –2.0V
—
40
—
mV
Vo = –5.2V
—
50
—
Transient Response
ttr
Io step between 0.5xImax and Imax
—
200
—
Sec
with Cout = 330F
Vos
Vo over/undershoot
—
200
—
mV
Efficiency
η
Vin =+5V, Io =0.5xImax
Vo = –1.5V
—
65
—
Vo = –2.0V
—
70
—
%
Vo = –5.2V
—
77
—
Vin = +3.3V, Io =0.5xImax
Vo = –2.0V
—
67
—
%
Vo = –5.2V
—
75
—
Switching Frequency
o
Over Vin and Io ranges
500
—
600
kHz
Absolute Maximum
Ta
Over Vin Range
0
—
+85 (2)
°C
Operating Temperature Range
Storage Temperature
Ts
-40
—
+125
°C
Weight
—
Vertical/Horizontal
—
28/33
—
grams
Notes: (1) ISR-will operate down to no load with reduced specifications.
(2) See SOA curves or contact the factory for the approrpiate derating.
12 Watt 5V/3.3V Input
Plus to Minus Voltage Converter
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