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参数资料
型号： PTH08T231WAZ
厂商： TEXAS INSTRUMENTS INC
元件分类： 电源模块
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封装： ROHS COMPLIANT PACKAGE-10
文件页数： 37/39页
文件大小： 1281K
代理商： PTH08T231WAZ
PTH08T230W, PTH08T231W
www.ti.com
SLTS265K – NOVEMBER 2005 – REVISED JUNE 2010
ELECTRICAL CHARACTERISTICS
TA =25°C, VI = 5 V, VO = 3.3 V, CI = 330 F, CO1 = 200 F ceramic, and IO = IO max (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTH08T231W
MIN
TYP
MAX
UNIT
IO
Output current
Over VO range
25°C, natural convection
0
6
A
0.69
≤ VO ≤ 1.2
4.5
14 (1)
VI
Input voltage range
Over IO range
1.2 < VO ≤ 3.6
4.5
14
V
3.6 < VO ≤ 5.5
VO +1
(2)
14
Output adjust range
Over IO range
0.69
5.5
V
Set-point voltage tolerance
±1.0 (3)
%Vo
Temperature variation
–40°C < TA < 85°C
±0.25
%Vo
VO
Line regulaltion
Over VI range
±3
mV
Load regulation
Over IO range
±2
mV
Total output variation
Includes set-point, line, load, –40°C
≤ TA ≤ 85°C
±1.5 (3)
%VO
RSET = 169 , VI = 8.0 V, VO = 5.0V
95%
RSET = 1.21 k, VO = 3.3 V
92%
RSET = 2.37 k, VO = 2.5 V
90%
RSET = 4.75 k, VO = 1.8 V
88%
h
Efficiency
IO = 6 A
RSET = 6.98 k, VO = 1.5 V
87%
RSET = 12.1 k, VO = 1.2 V
85%
RSET = 20.5 k, VO = 1.0 V
83%
RSET = 681 k, VO = 0.7 V
79%
VO Ripple (peak-to-peak)
20-MHz bandwidth
1(1)
%VO
ILIM
Overcurrent threshold
Reset, followed by auto-recovery
10
A
Recovery Time
80
Sec
w/o TurboTrans
CO1 = 200 mF, ceramic
VO Overshoot
85
mV
2.5 A/s load step
Recovery Time
120
Sec
w/o TurboTrans (4)
50% to 100% IOmax
Transient response
CO1 = 400 mF, ceramic
VI = 12 V
VO Overshoot
75
mV
VO = 3.3 V
with TurboTrans
Recovery Time
220
Sec
CO1 = 400 mF, ceramic
VO Overshoot
45
mV
RTT = 8.06 k
IIL
Track input current (pin 9)
Pin to GND
-130 (5)
A
dVtrack/dt
Track slew rate capability
CO ≤ CO (max)
1
V/ms
VI increasing, RUVLO = OPEN
4.3
4.45
Adjustable Under-voltage lockout
UVLOADJ
VI decreasing, RUVLO = OPEN
3.7
4.2
V
(pin 10)
Hysteresis, RUVLO ≤ 52.3 k
0.5
Input high voltage (VIH)
Open(6)
V
Inhibit control (pin 10)
Input low voltage (VIL)
-0.2
0.6
Input low current (IIL), Pin 10 to GND
235
A
Iin
Input standby current
Inhibit (pin 10) to GND, Track (pin 9) open
5
mA
f s
Switching frequency
Over VI and IO ranges, SmartSync (pin 1) to GND
300
kHz
(1)
For output voltages
≤ 1.2 V, at nominal operating frequency, the output ripple may increase (typically 2×) when operating at input
voltages greater than (VO × 11). When using the SmartSync feature to adjust the switching frequency, see the SmartSync
Considerations section of the datasheet for further guidance.
(2)
The minimum input voltage is 4.5V or (VO+1)V, whichever is greater. Additional input capacitance may be required when VI < (VO+2)V.
(3)
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1% with 100 ppm/°C or better temperature stability.
(4)
Without TurboTrans, the minimum ESR limit of 7 m
must not be violated.
(5)
A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 9. The
open-circuit voltage is less than 6.5 Vdc.
(6)
This control pin has an internal pull-up. Do not place an external pull-up on this pin. If it is left open-circuit, the module operates when
input power is applied. A small, low-leakage (<100 nA) MOSFET is recommended for control. For additional information, see the related
application information section.
Copyright 2005–2010, Texas Instruments Incorporated
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Product Folder Link(s): PTH08T230W PTH08T231W
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