Datasheet
SLUS489 − OCTOBER 2001
3
www.ti.com
electrical characteristics over recommended operating junction temperature range,
T
A
= −40_C to 85_C for the TPS43000, RT = 75 kΩ (500 kHz), VIN = VP = 3.5 V, VOUT = 3.1 V, COMP/FB
pins shorted, BUCK-configured, T
A
= T
J
(unless otherwise noted)
VIN
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Start-up voltage
VP = VOUT = 3.5 V, No load
1.45 1.65 1.85 V
Undervoltage lockout (UVLO) hysteresis
VP = VOUT = 3.5 V, No load
No MOSFETs connected
60 150 300 mV
Shutdown current
SYNC/SD = 1.6 V 1 10
A
Shutdown current
SYNC/SD = VIN 0.5 2
µA
Operating current Not in PFM mode, no MOSFETs connected 1.0 1.4 mA
Sleep mode current PFM mode, COMP/FB=900 mV 75 140 µA
BOOST-configured VIN operating current
Not in PFM mode, no MOSFETs connected,
BUCK pin grounded, VIN = 3.1 V,
VP = VOUT = 3.5 V
30 75 µA
BOOST-configured VIN sleep mode current
PFM mode, BUCK pin grounded,
VP = VOUT = 3.5 V, VIN = 3.1 V,
COMP/FB=900 mV
25 60 µA
VOUT
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Shutdown current SYNC/SD = VIN 0 2
Operating current Not in PFM mode, no MOSFETs connected 1 5
µA
Sleep mode current PFM mode, COMP/FB=900 mV 0 2
µA
BOOST-configured VOUT operating current
Not in PFM mode, no MOSFETs connected,
BUCK pin grounded, VIN = 3.1 V,
VP = VOUT = 3.5 V
1.0 1.4 mA
BOOST-configured VOUT sleep mode current
PFM mode, BUCK pin grounded,
VP = VOUT = 3.5 V, VIN = 3.1 V,
COMP/FB=900 mV
50 120 µA
VP
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Shutdown current SYNC/SD = VIN 0.5 2
Operating current Not in PFM mode, no MOSFETs connected 500 800
µA
Sleep mode current PFM mode, COMP/FB=900 mV 0 2
µA
error amplifier
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VREG, regulation voltage (COMP/FB pin)
1.8 V < VIN < 6 V 784 800 816
mV
VREG, regulation voltage (COMP/FB pin)
VIN = 3.5 V 788 800 812
mV
FB input current V
FB
= 800 mV −150 −10 150 nA
Sourcing current (out of COMP) V
FB
= (VREG − 100 mV), V
COMP
= 0 V, −2.0 −0.5 mA
Sinking current (into COMP) V
FB
= (VREG + 100 mV), V
COMP
= 2 V 0.5 1.2 mA
Maximum ouput voltage (COMP pin) V
FB
= 0 V, I
COMP
= −100 µA 1.6 2.0 V
Minimum output voltage (COMP pin) V
FB
= 2 V, I
COMP
= +100 µA 70 120 mV
Unity gain bandwidth See Note 1 5 MHz
NOTE 1: Ensured by design. Not production tested.