PTD08A020W Datasheet, PDF (4/6 Pages) Texas Instruments – 20-A, 4.75-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, DIGITAL POWERTRAIN™ MODULE

PTD08A020W
SLTS286 – MAY 2007
www.ti.com
ELECTRICAL CHARACTERISTICS
PTD08A010W
T_A= 25°C, V_I= 12 V, V_O= 3.3 V, V_B= V_I, C_I1= 330 µF, C_I2= 22 µF ceramic, C_O1= 47 µF ceramic, C_O2= 330 µF, and I_O= I_O(max)
(unless otherwise stated)
PARAMETER
I_O
V_I
V_OADJ
Output current
Input voltage range
Output voltage adjust range
η
Efficiency
V_OPP
V_B
V_B
UVLO
V_O Ripple (peak-to-peak)
Bias voltage
Bias voltage under voltage
lockout
I_B
Bias current
V_IH
High-level input voltage
V_IL
Low-level input voltage
PWM input
TEMP output
V_OH
V_OL
FAULT output
I_LIM
IOUT output
C_I
External input capacitance
C_O
External output capacitance
TEST CONDITIONS
Over V_O range
Over I_O range
Over I_O range
25°C, natural convection
I_O = 20 A,
fs = 350 kHz
20-MHz bandwidth
V_O = 3.3 V
V_O = 2.5 V
V_O = 1.8 V
V_O = 1.5 V
V_O = 1.2 V
V_O = 1.0 V
Inhibit (pin 8) to AGND
V_B increasing
V_B decreasing
Standby
Switching
SRE, INH, & PWM input levels
Frequency range
Duty cycle limts
Pulse width limits
Rise time
Range
Accuracy, -40°C ≤ T_A≤ 85°C
Slope
Offset, T_A = 0°C
High-level output voltage
Low-level output voltage
Overcurrent threshold; Reset, followed by auto-recovery
Range
Accuracy
Gain
Offset
Nonceramic
Ceramic
Capacitance Value
Nonceramic
Ceramic
Equivalent series resistance (non-ceramic)
PTD08A010W
MIN
TYP
0
4.75
0.7
91%
89%
86%
84%
83%
80%
20
4.75
5
4.25
4.5
4.0
4.25
5
tbd
2.0
300
tbd
tbd
tbd
tbd
-4.0
tbd
tbd
tbd
tbd ⁽⁵⁾
10
500
30
tbd
tbd
tbd
330 ⁽²⁾
22 ⁽²⁾
330 ⁽³⁾
47 ⁽³⁾
MAX
20
14 ⁽¹⁾
3.6
tbd
4.75
4.5
5.5
0.8
500
tbd
tbd
tbd
tbd
+6.0
tbd
tbd
tbd
tbd ⁽⁴⁾
tbd
UNIT
A
V
V
mV_PP
V
V
mA
V
kHz
°C
mV/°C
mV
V
A
µF
µF
mΩ
(1) The maximum input voltage is duty cycle limited to (V_O× tbd) or 14 V, whichever is less. The maximum allowable input voltage is a
function of switching frequency. Please review the Application Information section for more information.
(2) A 22 µF ceramic input capacitor is recommended for operation. An additional 330 µF bulk capacitor rated for a minimum of 500mA rms
of ripple current is recommended.
(3) A 47 µF ceramic output capacitor is recommended for operation. An additional 330 µF bulk capacitor is recommended for improved
transient response. See the related Application Information section for further guidance.
(4) tbd µF is the calculated maximum output capacitance. The minimum ESR limitation will often result in a lower value.
(5) This is the minimum ESR for all non-ceramic output capacitance. Use tbd mΩ as a minimum when using capacitor manufacturer's
maximum ESR values.
4
Submit Documentation Feedback