Datasheet

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TPS40130
SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005
ELECTRICAL CHARACTERISTICS (continued)
T
A
= -40°C to 85°C, V
IN
= 12 V, R
RT
= 64.9 k Ω , T
J
= T
A
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SOFT START
32 clocks after EN/SYNC before SS current
I
SS
Soft-start source current 3.5 5.0 6.5 µA
begins
V
SS
Fault enable threshold voltage 0.95 1.00 1.05 V
CURRENT SENSE AMPLIFIER
Input offset voltage CS1, CS2 -5 4 10 mV
Gain transfer to PWM comparator -100 mV ≤ V
CS
≤ 100 mV, V
CSRT
= 1.5 V 5.1 5.6 6.1 V/V
Transconductance to DROOP V
CS
- V
CSRTn
= 100 mV 40 µA
Gain variance between phases V
CS
- V
CSRTn
= 100 mV -4% 0 4%
Input offset variance V
CS
= 0 V -3.5 0 3.5 mV
Offset current at DROOP V
CS
- V
CSRTn
= 0 V 6 µA
Input common mode
(2)
0 V
BP5
-0.7 V
Bandwidth
(2)
18 MHz
DIFFERENTIAL AMPLIFIER
Gain 1 V/V
Gain tolerance V
OUT
= 4 V vs V
OUT
= 0.7 V, V
GSNS
= 0 V -0.5% 0.5%
CMRR Common mode rejection ratio
(2)
0.7 V ≤ V
OUT
≤ 4.0 V 60 dB
Output source current V
OUT
- V
GSNS
= 2.0 V, V
DIFFO
≥ 1.98 V 2 4
mA
Output sink current V
OUT
- V
GSNS
= 2.0 V, V
DIFFO
≥ 2.02 V 2 4
Input offset voltage
(2)
0.7 V ≤ V
OUT
≤ 4.0 V 5 mV
Bandwidth
(2)
5 MHz
Input impedance, non-inverting
(2)
V
OUT
to GND 40
k Ω
Input impedance, inverting
(2)
V
GSNS
to V
DIFFO
40
GATE DRIVERS
Source on-resistance, HDRV1, V
BOOT1
= 5 V, V
BOOT2
= 5 V, V
SW1
= 0 V,
1.0 2.0 3.5
HDRV2 V
SW2
= 0 V, Sourcing 100 mA
Ω
V
BOOT1
= 5 V, V
BOOT2
= 5 V, V
VIN5
= 5 V,
Sink on-resistance, HDRV1, HDRV2 0.5 1.0 2.0
V
SW1
= 0 V, V
SW2
= 0 V, Sinking 100 mA
Source on-resistance, LDRV1, V
VIN5
= 5 V, V
SW1
= 0 V, V
SW2
= 0 V,
1 2 3.5
LDRV2 Sourcing 100 mA
Ω
V
VIN5
= 5 V, V
SW1
= 0 V, V
SW2
= 0 V,
Sink on-resistance, LDRV1, LDRV2 0.30 0.75 1.50
Sinking 100 mA
t
RISE
Rise time, HDRV
(2)
C
LOAD
= 3.3 nF 25 75
t
FALL
Fall time, HDRV
(2)
C
LOAD
= 3.3 nF 25 75
t
RISE
Rise time, LDRV
(2)
C
LOAD
= 3.3 nF 25 75
t
FALL
Fall time, LDRV
(2)
C
LOAD
= 3.3 nF 25 60 ns
SW falling to LDRV rising 50
t
DEAD
Dead time
(2)
LDRV falling to SW rising 30
t
ON
Minimum controllable on-time
(2)
C
LOAD
= 3.3 nF 150
OUTPUT UNDERVOLTAGE FAULT
V
FB
relative to GND 560 588 610 mV
Undervoltage fault threshold
V
FB
relative to V
VREF
-20% -16% -13%
OUTPUT OVERVOLTAGE SET
V
OVSET
relative to GND 796 817 832 mV
Overvoltage threshold
V
OVSET
relative to V
VREF
14% 16% 19%
(2) Ensured by design. Not production tested.
5
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