TPS61170-Q1 Datasheet, PDF (3/28 Pages) Texas Instruments – 1.2A High Voltage Boost Converter in 2x2mm2 QFN Package

TPS61170-Q1
www.ti.com
SLVSAX2 – SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS
VIN = 3.6 V, CTRL = VIN, T_A = –40°C to 125°C, typical values are at T_A = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
SUPPLY CURRENT
V_I
I_Q
I_SD
UVLO
Input voltage range, VIN
Operating quiescent current into VIN
Shutdown current
Under-voltage lockout threshold
Device PWM switching no load
CRTL=GND, VIN = 4.2 V
VIN falling
3.0
18
V
2.3 mA
1
μA
2.2 2.5
V
V_hys
Under-voltage lockout Hysteresis
ENABLE AND REFERENCE CONTROL
70
mV
V_(CTRLh)
CTRL logic high voltage
V_(CTRL)
CTRL logic low voltage
R_(CTRL)
CTRL pull down resistor
t_off
t_{es_det}
CTRL pulse width to shutdown
Easy Scale detection time⁽¹⁾
t_{es_delay}
Easy Scale detection delay
t_{es_win}
Easy Scale detection window time
VOLTAGE AND CURRENT CONTROL
VIN = 3 V to 18 V
VIN = 3 V to 18 V
CTRL high to low
CTRL pin low
1.2
V
0.4
V
400 800 1600
kΩ
2.5
ms
260
μs
100
μs
1
ms
V_REF
V_{(REF_PWM)}
Voltage feedback regulation voltage
Voltage feedback regulation voltage under
reprogram
V_FB = 492 mV
1.204 1.229 1.254
V
477 492 507 mV
I_FB
Voltage feedback input bias current
f_S
Oscillator frequency
D_max
Maximum duty cycle
t_{min_on}
Minimum on pulse width
I_sink
Comp pin sink current
I_source
Comp pin source current
G_ea
Error amplifier transconductance
R_ea
Error amplifier output resistance
f_ea
Error amplifier crossover frequency
POWER SWITCH
V_FB = 1.229 V
V_FB = 100 mV
5 pF connected to COMP
5 pF connected to COMP
1.0
90%
240
1.2
93%
40
100
100
320
6
500
200
nA
1.5 MHz
ns
μA
μA
400 μmho
MΩ
kHz
R_DS(on)
N-channel MOSFET on-resistance
VIN = 3.6 V
VIN = 3.0 V
0.3 0.6
Ω
0.7
I_{LN_NFET}
N-channel leakage current
OC and SS
V_SW = 35 V, T_A = 25°C
1
μA
I_LIM
I_{LIM_Start}
t_{Half_LIM}
t_REF
t_step
N-Channel MOSFET current limit
Start up current limit
Time step for half current limit
Vref filter time constant
V_REF ramp up time
D = D_max
D = D_max
0.96 1.2 1.44
A
0.7
A
5
ms
180
μs
213
μs
(1) EasyScale communication is allowed immediately after the CTRL pin has been low for more than t_{es_det}. To select EasyScale™ mode,
the CTRL pin must be low for more than t_{es_det} the end of t_{es_win}.
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): TPS61170-Q1
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