
SLTS295B – DECEMBER 2009 – REVISED DECEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
PTD08D210W
TA= 25°C, FSW= 750kHz, VI= 12 V, VO= 1.2 V, CI1= 330 F, CI2= 22 F ceramic, CO1= 47 F ceramic, CO2= 330 F, IO= IO(max),
single output (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTD08D210W
UNIT
MIN
TYP
MAX
IO
Output current
Over VO range
25°C, natural convection
0
10
A
VI
Input voltage range
Over IO range
4.75
14
V
VOADJ
Output voltage adjust range
Over IO range
0.7
3.6(1)
V
VO = 3.3 V
92.8%
VO = 2.5 V
91.4%
VO = 1.8 V
89.1%
IO = 10 A,
h
Efficiency
fs = 750 kHz
VO = 1.5 V
87.7%
VO = 1.2 V
85.6%
VO = 1.0 V
84.0%
VOPP
VO Ripple (peak-to-peak)
20-MHz bandwidth
11
mVPP
IB
Bias current
PWM & SRE to AGND
Standby
6
mA
VIH
High-level input voltage
2.0
5.5
SRE & PWM input levels
V
VIL
Low-level input voltage
0.8
Frequency range
500(1)
1000
kHz
PWM input
Pulse width limits
20
ns
Range
-40
125
°C
Accuracy, -40°C
≤ TA ≤ 85°C
-5
5
°C
TEMP output
Slope
10
mV/°C
Offset, TA = 25°C
720
mV
VOH
High-level output voltage, IFAULT = 4mA
2.7
3.3
V
VOL
FAULT output
Low-level output voltage, IFAULT = 4mA
0
0.6
ILIM
Overcurrent threshold; Reset, followed by auto-recovery
15(2)
A
Range
0.15
3.5
V
Gain, 3A
≤ IO ≤ 10A
188
200
212
mV/A
IOUT output
Offset, IO = 0A, VO = 1.2V
0
0.3
0.76
V
Output Impedance
10
k
Nonceramic
330 (3)
CI
External input capacitance
F
Ceramic
22 (3)
Nonceramic
330 (4)
5000(5)
Capacitance Value
F
CO
External output capacitance
Ceramic
47 (4)
Equivalent series resistance (non-ceramic)
1(6)
m
(1)
When operating at 12V input and 500kHz, VO is limited to ≤ 2.0V.
(2)
The current limit threshold is the sum of IO and the peak inductor ripple current.
(3)
A 22 F ceramic input capacitor is required for proper operation. An additional 330 F bulk capacitor rated for a minimum of 500mA rms
of ripple current is recommended. When operating at frequencies > 500kHz the 22 F ceramic capacitor is only recommended. Refer to
the UCD9240 controller datasheet and user interface for application specific capacitor specifications.
(4)
A 47 F ceramic output capacitor is required for basic operation. An additional 330 F bulk capacitor is recommended for improved
transient response. Refer to the UCD9240 controller datasheet and user interface for application specific capacitor specifications.
(5)
5,000 F is the calculated maximum output capacitance given a 1V/msec output voltage rise time. Additional capacitance or increasing
the output voltage rise rate may trigger the overcurrent threshold at start-up. Refer to the UCD9240 controller datasheet and user
interface for application specific capacitor specifications.
(6)
This is the minimum ESR for all non-ceramic output capacitance. Refer to the UCD9240 controller datasheet and user interface for
application specific capacitor specifications.
4
Copyright 2009–2010, Texas Instruments Incorporated