Datasheet

TPS40400
www.ti.com SLUS930B –APRIL 2011– REVISED OCTOBER 2011
ELECTROSTATIC DISCHARGE PROTECTION
MIN TYP MAX UNIT
Human Body Model (HBM) 2500 V
Charged Device Model (CDM) 1500 V
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these specifications apply for –40°C ≤ T
J
≤ 125°C, V
DD
= 12 Vdc, FREQUENCY_SWITCH = 600 kHz
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
V
VDD
Input voltage range 3 20 V
I
VDD
Input operating current Switching, no driver load 6 15 mA
VOLTAGE REFERENCE
V
FB
Feedback pin voltage default settings -40ºC ≤ T
J
≤ 125ºC 594 600 606 mV
V
FB(max)
Feedback pin voltage maximum adjustment 750 mV
V
FB(min)
Feedback pin voltage minimum adjustment 450 mV
V
FB(inc)
Feedback pin voltage adjustment resolution 2.34 mV
Maximum nonlinearity error over adjustment
V
FB(NL)
10 mV
range
BP6 REGULATOR
V
BP6
6-V regulator output voltage 6.2 6.5 6.8 V
V
DO6
Regulator dropout voltage, (V
VDD
– V
BP6
) V
VDD
= 6 V, I
BP6
= 50 mA 300 mV
I
BP6
Regulator current limit 100 mA
BP3 REGULATOR
V
BP3
3.3-V regulator output voltage 3.1 3.3 3.5 V
V
DO3
Regulator dropout voltage, (V
VDD
– V
BP3
) V
VDD
= 3V, I
BP3
= 5 mA 100 200 mV
OSCILLATOR
f
SW
Switching frequency Factory default setting 480 600 720
kHz
Nominal frequency range 200 2000
Accuracy 3 V ≤ V
VDD
≤ 20 V, 200 kHz ≤ f
SW
≤ 2 MHz –20% 20%
V
IH
SYNC high-level input voltage 2.0
V
V
IL
SYNC low-level input voltage 0.4
V
SYNC
= 6 V 100
I
SYNC
SYNC pin leakage current nA
V
SYNC
= 0 V 100
t
SRISE
Maximum SYNC rise time
(1)
100 ns
t
SYNC
Minimum SYNC pulse width 100 ns
FREQUENCY_SWITCH = 200 kHz V
VDD
/6.6 V
VDD
/6.5 V
VDD
/6.3 V
V
RMP
Ramp amplitude
(1)
FREQUENCY_SWITCH = 600 kHz V
VDD
/7.0 V
VDD
/6.8 V
VDD
/6.6
FREQUENCY_SWITCH = 2000 kHz V
VDD
/10 V
VDD
/9.6 V
VDD
/9.2
V
VLY
Valley voltage
(1)
0.9
f
SYNC
SYNC range % of nominal oscillator frequency 200 kHz ≤ f
SW
≤ 2 MHz 85% 150%
PULSE WIDTH MODULATOR (PWM)
FREQUENCY_SWITCH = 600 kHz 90%
D
MAX
Maximum duty cycle
(1) (2)
FREQUENCY_SWITCH = 1.2 MHz 85%
FREQUENCY_SWITCH = 2 MHz 75%
t
OFF(min)
Minimum OFF time 170 225 ns
t
ON(min)
Minimum controllable pulse
(1)
T
J
= 25°C, f
SW
= 600 kHz 75 ns
(1) Ensured by design. Not production tested.
(2) Operation at 3 V reduces maximum duty cycle by approximately 5%.
Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s) :TPS40400