Datasheet

TPS43330-Q1
TPS43332-Q1
www.ti.com SLVSA82E –MARCH 2011–REVISED APRIL 2013
DC ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 8 V to 18 V, T
J
= –40°C to 150°C (unless otherwise noted)
NO. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
High-Side External NMOS Gate Drivers for Buck Controller
5.11 I
GX1_peak
Gate-driver peak current 1.5 A
5.12 r
DS(on)
Source and sink driver V
REG
= 5.8 V, I
GX1
current = 200 mA 2 Ω
Low-Side NMOS Gate Drivers for Buck Controller
5.13 I
GX2_peak
Gate-driver peak current 1.5 A
5.14 R
DS ON
Source and sink driver V
REG
= 5.8 V, I
GX2
current = 200 mA 2 Ω
Error Amplifier (OTA) for Buck Converters
COMPA, COMPB = 0.8 V,
5.15 Gm
BUCK
Transconductance 0.72 1 1.35 mS
source/sink = 5 µA, test in feedback loop
5.16 I
PULLUP_FBx
Pullup current at FBx pins FBx = 0 V 50 100 200 nA
6.0 Digital Inputs: ENA, ENB, ENC, SYNC
6.1 V
IH
Higher threshold V
IN
= 13 V 1.7 V
6.2 V
IL
Lower threshold V
IN
= 13 V 0.7 V
6.3 R
IH_SYNC
Pulldown resistance on SYNC V
SYNC
= 5 V 500 kΩ
6.4 R
IL_ENC
Pulldown resistance on ENC V
ENC
= 5 V 500 kΩ
Pullup current source on ENA,
6.5 I
IL_ENx
V
ENx
= 0 V 0.5 2 µA
ENB
7.0 Boost Output Voltage: DIV
7.1 V
IH_DIV
Higher threshold V
REG
= 5.8 V V
REG
– 0.2 V
7.2 V
IL_DIV
Lower threshold 0.2 V
7.3 V
oz_DIV
Voltage on DIV if unconnected Voltage on DIV if unconnected V
REG
/ 2 V
8.0 Switching Parameter – Buck DC-DC Controllers
8.1 f
SW_Buck
Buck switching frequency RT pin: GND 360 400 440 kHz
8.2 f
SW_Buck
Buck switching frequency RT pin: 60-kΩ external resistor 360 400 440 kHz
Buck adjustable range with
8.3 f
SW_adj
RT pin: external resistor 150 600 kHz
external resistor
8.4 f
SYNC
Buck synchronization range External clock input 150 600 kHz
8.5 f
SS
Spread-spectrum spreading TPS43332-Q1 only 5%
9.0 Internal Gate-Driver Supply
Internal regulated supply V
IN
= 8 V to 18 V, V
EXTSUP
= 0 V, SYNC = high 5.5 5.8 6.1 V
9.1 V
REG
I
VREG
= 0 mA to 100 mA, V
EXTSUP
= 0 V,
Load regulation 0.2% 1%
SYNC = high
Internal regulated supply V
EXTSUP
= 8.5 V 7.2 7.5 7.8 V
9.2 V
REG(EXTSUP)
I
EXTSUP
= 0 mA to 125 mA, SYNC = High
Load regulation 0.2% 1%
V
EXTSUP
= 8.5 V to 13 V
EXTSUP switch-over voltage I
VREG
= 0 mA to 100 mA,
9.3 V
EXTSUP-th
4.4 4.6 4.8 V
threshold V
EXTSUP
ramping positive
9.4 V
EXTSUP-Hys
EXTSUP switch-over hysteresis 150 250 mV
9.5 I
VREG-Limit
Current limit on VREG V
EXTSUP
= 0 V, normal mode as well as LPM 100 400 mA
I
VREG_EXTSUP-
Current limit on VREG when using I
VREG
= 0 mA to 100 mA,
9.6 125 400 mA
Limit
EXTSUP V
EXTSUP
= 8.5 V, SYNC = High
10.0 Soft Start
10.1 I
SSx
Soft-start source current V
SSA
and V
SSB
= 0 V 0.75 1 1.25 µA
11.0 Oscillator (RT)
11.1 V
RT
Oscillator reference voltage 1.2 V
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